Kia Optima vs Lexus ES250

What's the difference?

If you travel long distances, want a good amount of space and don’t want to pay big bucks for a new car, then yeah, maybe there is a reason sedans like this will hang around for a while longer.

Sure, the appeal of sedans mightn’t be as strong as it once was, but models like the Kia Optima prove they still have a reason to exist.

Since day one Lexus has aimed to prise buyers away from the limpet-like grip of traditional luxury car players. Conventional marketing wisdom says consumers buy brands, with the actual product a secondary consideration. 

The updated ES has the value, efficiency, safety, and driving refinement to again challenge the establishment. Amazingly, the ownership package, specifically the warranty, is starting to lag the market. 

But for open-minded premium buyers this product is worth a look before following a well-worn brand path. And if it was my money, the ES 300h Luxury with Enhancement Pack is the range sweet spot for value and performance.

Cosmetic changes for the facelifted 2018 Kia Optima include new headlights and tail-lights with revised LED signatures (but still halogen lamps in the base model), and there are newly sculpted bumpers and new wheel designs across the two-model range. 

We had the base model Si, which doesn’t look as good as the GT model, because it has smaller wheels, the sporty body kit and misses out on the LED headlights, but the LED daytime running lights are still present.

The GT has a more aggressive look, and the side skirts, front spoiler and rear diffuser fit it better - there are dual exhausts, but not sporty quad exhaust tips.

In fact, this model is a bit like the old-man version of the Optima. No offence intended to old men, of course. The GT is just heaps sportier, and I reckon it’s considerably more attractive as a result. 

Still, the inherent sleek styling of the Optima remains - the chrome highlighting along the window line is a bit too sheeny for me, but the angles and stance of this model are quite gracious. I really dig the fact the top of the windscreen mirrors the ‘Tiger Nose’ grille shape.

I'm no exterior designer, but I liked the existing Optima more - it just looked a bit neater, even though it had a decent amount of bling with its Mercedes-like diamond-pattern grille, as opposed to the cheese grater look seen here.

There’s not quite as much bling inside the cabin of the Si, either, but it is still a well-designed space - just not as special as the premium package offering of the GT (which gets leather trim - not nappa leather, but still a quality cowhide finish, and more). Check out our interior photos to see if you agree - but size and interior dimensions of the Optima are hard to argue against.

From shy wallflower to life of the party, the Lexus ES was given a comprehensive design makeover for its seventh generation.

A dramatic, angular exterior incorporates signature elements of the Lexus brand's distinctive design language including an unmissable ‘spindle grille’, but is still clearly recognisable as a conventional 'three-box’ sedan.

The jagged headlights now feature ‘tri-beam’ LEDs on F Sport and Sports Luxury grades, adding an extra air of purpose to an already bold face. And the grille on Luxury and Sports Luxury models is now made up of multiple L-shaped elements, mirrored across the top and bottom sections, then finished in gunmetal grey for a close to 3D effect.

The ES is offered in 10 colours - ‘Sonic Iridium’, ‘Sonic Chrome’, ‘Sonic Quartz’, ‘Onyx’, ‘Graphite Black’, ‘Titanium’, ‘Glacial Ecru’, ‘Radiata Green’, ‘Vermillion’ and ‘Deep Blue’ with two other shades reserved for the F Sport only - ‘White Nova’ and ‘Cobalt Mica.’

Inside, the dash is a mix of simple sweeping surfaces contrasted by a flurry of activity around the centre stack and instrument cluster.

Located roughly 10cm closer to the driver, the new multimedia screen is a 12.3-inch unit with touch functionality, a welcome alternative to the laggy and inaccurate Lexus ‘Remote Touch’ trackpad set-up. Remote Touch remains, but my advice is to ignore it and use the touchscreen.

The instruments sit in a deeply hooded binnacle with buttons and dials on and around it. Not the sleekest design in the segment and passable only from an ergonomic point-of-view, but the overall feel is suitably premium.

I really like the way Kia designs its cabins. Sure, there’s a lot of black in here, but there’s also a lot of thought put into the usability of the space.  

The high-mounted 7.0-inch infotainment and multimedia touch screen in the Si is simple to use, and for 2018 the Optima range gets Apple CarPlay and Android Auto - you couldn’t get that in the Optima up to this point. 

Also included are a reversing camera, USB input, Bluetooth phone and audio streaming and six speakers. The Si model misses out on sat nav - you’ll have to use the maps app on your phone. No DVD player either.

Storage is well thought out in here, with big bottle holders in the doors, a good sized pair of cup holders up front, and a nice little storage bin for your phone, wallet, keys and so on.

There’s a driver info screen with a digital speedo, and even on this base model you get a dual-zone climate control air conditioner. The updated Optima gets a new steering wheel, too.

Now, what about the back seat?

It may be considered a ‘mid-sized’ sedan, but there’s limo-like space. With the driver’s seat in my position (I’m about six feet tall) there was still heaps of rear legroom in the rear seat, with ample knee room, good foot room and decent shoulder space, too - three of me could slot across the back bench comfortably, which means kids will fit easily, too. There are three top-tether points and two ISOFIX points as well.

Kids and adults alike will be happy with the rear air vents back here, and there’s a flip down armrest with cupholders, too. Again, big bottle holders appear in the doors, and there are map pockets in the back seats.

What about boot space? With so many people choosing SUVs over sedans because they’re theoretically more practical, the Optima offers good food for thought - it has enough luggage capacity for a bunch of suitcases (510 litres VDA in size) and there’s a full-size alloy spare under the boot floor. If you need more, you could always invest in a roof rack setup?

An overall length just under 5.0m long shows how much the ES and its competitors have crept up in size over recent generations. The Merc C-Class is more a mid-size car than the compact sedan it once was, and at nearly 1.9m wide and standing a bit over 1.4m tall the ES more than matches it for space.

There's plenty of room up front, the car feeling open and spacious from behind the wheel, thanks in part to the low sweep of the dash. And the rear is just as commodious.

Sitting behind the driver's seat set for my 183cm (6'0”) position I enjoyed good leg and toe room, with more than enough headroom, despite inclusion of a tilt and slide glass sunroof on all models.

Not only that, entry to and egress from the rear is a breeze thanks to a large aperture and wide opening doors. And while the back seat is best for two, three adults across is do-able without too much pain and suffering for short to medium journeys.

Connectivity and power options are plentiful with twin USB ports and a 12-volt socket front and rear. And storage starts with two cupholders in the front centre console, and another pair in the fold-down rear centre armrest.

If the remote touch system was (deservedly) given the boot, there would be room for extra oddments space in the front console.

The front door pockets are adequate rather than large (smaller bottles only), the glove box is modest, but the storage box (with padded armrest lid) between the front seats is more generous.

There are adjustable air vents for rear passengers, which you'd expect in this category, but are always a plus none-the-less.

The rear door pockets are okay, except the opening is relatively slim so bottles are a struggle, but there are map pockets on the back of both front seats as another bottle option.

Important to note that while boot space is decent at 454 litres (VDA) the rear seat doesn't fold. At all. A lockable ski port door sits behind the rear armrest, but the lack of a split-folding back seat is a significant practicality compromise.

A reasonably high loading lip into the boot isn't great, either, but there are tie-down hooks to help secure loose loads.

The Lexus ES is a no-tow zone and a space-saver spare is your only flat tyre option.

The existing ES 300h (the ‘h’ denoting hybrid) is now joined by a non-hybrid model using the same petrol engine, tuned specifically to run without the support of an electric motor.

The pre-update, hybrid-only ES line-up spanned six model variations across a roughly $15K price spread from the ES 300h Luxury ($62,525) to the ES 300h Sports Luxury ($77,000).

Now there are five models with an ‘Enhancement Pack’ (EP) available on three of them, for an effective range of eight grades. Again, it's a $15K spread, stretching from the ES 250 Luxury ($61,620, before on-road costs) to the ES 300h Sports Luxury ($76,530).

Let's kick-off with the ES 250 Luxury. Aside from the safety and powertrain tech covered later in the review, the ‘entry-level’ grade is loaded with standard features including, 10-way power-adjustable and heated front seats, dual-zone climate control air, active cruise control, a new 12.3-inch multimedia touchscreen, satellite navigation (with voice control), keyless entry and start, 17-inch alloy wheels, a glass sunroof, auto rain-sensing wipers, plus 10-speaker audio with digital radio, as well as Apple CarPlay and Android Auto compatibility. The steering wheel and gearshift are leather-trimmed, while the seat trim is synthetic leather.

An Enhancement Pack adds wireless phone charging, privacy glass, a colour head-up display, and $1500 to the price tag (total $63,120).

The next rung up the price ladder brings the hybrid powertrain into play, so the ES 300h Luxury ($63,550) retains all the features of the ES 250 Luxury EP and adds a rear spoiler and power adjustable steering column.

Opting for the ES 300h Luxury EP then adds a power boot lid (with kick sensor), leather-accented trim, 18-inch rims, panoramic view monitor (overhead and 360-degree), 14-way power driver's seat (with memory settings), ventilated front seats, side blinds and a power rear sunshade, as well as $8260 to the price (total $71,810).

Next, as the name implies, two ES F Sport models dial up the performance personality.

The ES 250 F Sport ($70,860) retains the features of the ES 300h Luxury EP (except side blinds) while adding LED headlights with adaptive high-beam, a ‘wire-mesh’ grille, sports body kit, 19-inch wheels, performance dampers, an 8.0-inch driver display, alloy interior accents and grippier F Sport seats.

Stump up for the ES 300h F Sport ($72,930) and you'll ride on an adaptive suspension system with two driver-selectable settings, Go one step further and select the ES 300h F Sport EP ($76,530) and you'll also be cranking up a 17-speaker Mark Levinson audio system and warming your hands on a heated steering wheel.

Then, the top-of-the ES pyramid, the 300h Sports Luxury ($78,180), puts it all on the table adding top-shelf semi-aniline leather-accented trim, power adjustable, reclining, and heated rear outboard seats, tri-zone climate control, as well as side door blinds and a power rear sunshade. The rear centre armrest also features controls for the sunshade, seat heating (and angle), as well as audio and climate settings.

That's a lot to take in, so here's a table to help clarify the model walk-up. But suffice it to say this ES maintains Lexus’ reputation for value, testing its competitors in the luxury sedan space.

The Si model is powered by a 2.4-litre four-cylinder petrol engine, which has seen no changes to its specifications for this mid-life update.

Engine specs remain at 138kW of power at 6000rpm, while torque is rated at 241Nm at 4000rpm. It makes use of a six-speed automatic transmission only - there’s no manual transmission here, but you do get paddle shifters - and it's front wheel drive (the Optima isn't available with AWD, or as a 4x4, or in rear wheel drive - the latter is left to its bigger brother, the Stinger).

The GT gets a zestier drivetrain with more horsepower - it has a 2.0-litre turbo four-cylinder engine with 180kW/350Nm, which is much more desirable, but also louder than the Si’s 2.4. It also has a six-speed auto transmission, and is FWD. If you're into ratings and statistics, that 2.0-litre with a turbocharger is one of the perkier offerings for its engine size in the class.

There is no hybrid model available, despite a plug in hybrid petrol version (allowing you to run in EV mode) being sold in European markets. No diesel here, either, while other markets get a 1.7-litre turbo diesel. No LPG model here, or anywhere else, for that matter.

Towing capacity for Optima models is 750kg unbraked and 1700kg braked for the 2.4-litre, and 700kg/1400kg for the 2.0-litre turbo. Tow bar down-weight is capped at 80kg.

If you're concerned about engine problems, suspension problems, clutch and transmission issues, be sure to check out our Kia Optima problems page.

The ES 250 is powered by an all-alloy, 2.5-litre, naturally aspirated (A25A-FKS) four-cylinder engine featuring DVVT (Dual Variable Valve Timing) - electrically actuated on the intake side, and hydraulically on the exhaust side. It also uses a combination of direct and multi-point fuel-injection (D-4S).

Maximum power is a handy 152kW at 6600rpm and peak torque of 243Nm is available between 4000-5000rpm, with drive going to the front wheels via an eight-speed automatic transmission.

The 300h features a modified (A25A-FXS) version of the same engine using the Atkinson combustion cycle which plays with valve timing to effectively shorten the intake stroke and lengthen the expansion stroke.

The down-side of this set-up is a loss of low-end power, while the up-side is improved fuel efficiency. Which makes it perfect for a hybrid application where an electric motor can make up for the low-end shortfall.

Here, the result is a combined output of 160kW, with the petrol engine producing its peak power (131kW) at 5700rpm.

The 300h's motor is a permanent magnet synchronous type producing 88kW/202Nm, and the battery is a 204-cell nickel-metal hydride type with a capacity of 244.8 volts.

Drive again goes to the front wheels, this time via a continuously variable transmission (CVT).

Kia claims a very realistic fuel economy rating of 8.3 litres per 100 kilometres for the Si model, and we saw damn close to that consumption during our week of testing. On the highway it will sit at around 6.5L/100km, ensuring good mileage, while city driving will push usage above 12.0L/100km. Our overall average was 8.5L/100km, which is good. Use the eco mode, and you'll get a little better use.

The turbocharged GT model uses a little more, according to Kia’s 8.5L/100km combined average claim, but we guarantee you’ll actually use more than that because it’s more eager to please.

Fuel tank capacity is 70 litres - plenty of size for long distance drives.

Hyundai's official fuel economy figure for the ES 250, on the ADR 81/02 - urban, extra-urban cycle, is 6.6L/100km for the Luxury and 6.8L/100km for the F-Sport, the 2.5-litre four emitting 150 and 156g/km of C02 (respectively) in the process.

The official combined cycle fuel economy figure for the ES 350h, is just 4.8L/100km, the hybrid powertrain emitting only 109g/km of C02.

While the launch program didn't allow us to capture real-world (at the bowser) figures we did see a dash-indicated average of 5.5L/100km in the 300h, which is brilliant for a car in this class, weighing in at 1.7 tonnes.

You'll need 60 litres of 95RON premium unleaded to fill ES 250's tank and 50 litres to brim the ES 300h. Using Lexus figures that equates to a range of a little less than 900km in the 250 and just over 1000km in the 350h (900km using our dash-indicated number).

To further sweeten the fuel economy equation Lexus provides an Ampol/Caltex five-cents-per-litre discount as a permanent offer via the Lexus app. Nice.

The Optima has some really good elements to the way it drives, but sadly  some less impressive bits as well.

Let’s start with the not-so-great stuff - the 2.4-litre engine in this Si model just isn’t as enjoyable as the turbo unit, and the fact that Kia still doesn’t offer a hybrid version here, despite doing so elsewhere, is a bit of a downer.

The drivetrain isn’t terrible - the six-speed auto is smart enough, and there’s usable power if you boot it. The two more sedate drive modes, 'Eco' and 'Comfort', mean the transmission will aim to save fuel and limit throttle response, with a bit more of a lazy feel to the drive experience. But in 'Sport' mode it is definitely more rewarding in terms of acceleration and performance, offering a bit more pep and urgency (we didn't do a 0-100 km/h speed test, but take our word for it); it undoubtedly at the cost of fuel consumption.

It’s just a bit of a shame Kia doesn’t offer the turbo in this spec, too. Fuel use for the Si model is better than the turbo, however, so it could be ideal for buyers who are more worried about the bottom line than design and a sportier drive.

The thing I like most about the Optima is its road manners - the steering and suspension have been tuned for local conditions, just like all Kia products, and it shows. 

The electric power steering is really well sorted, making for easy parking moves and good assuredness at higher speeds. And the turning circle is decent, too - 10.9m (so, the turning radius is 5.45m). 

Plus the ride comfort is really good. On the highway it coasts along with very little fuss, and around town it deals with lumps and bumps impressively. Sharp edges can upset things a tad, and mid-corner bumps can make it jitterbug a little bit, but not to a degree that would rule it out of contention if you want a mid-sized sedan.

It’s pretty quiet on the open road, too, and the adaptive cruise control makes long-distance driving a simple task. The GT does suffer a little bit more road noise, though.

The first thing you notice behind the wheel of this ES is how extraordinarily quiet it is. Sound absorption materials are stuffed all around the body. Even the engine cover has been designed to keep the decibels down.

And ‘Active Noise Control’ (ANC) uses the audio system to generate “noise-cancelling waves” to suppress mechanical clatter from the engine and transmission. The car is eerily EV-like in it's pin-drop interior tranquility.

We focused on the ES 300h for the launch drive, and Lexus claims 0-100km/h 8.9sec for this version of the car. It feels every bit that quick, but the engine ‘noise’ and exhaust note are like the humming of a distant bee hive. With thanks to Daryl Kerrigan, how's the serenity?

Around town the ES is composed and supple, absorbing pock-marked urban irregularities with ease, and on the freeway it feels like a hovercraft.

Lexus makes a lot of noise about the torsional stiffness of the ‘Global Architecture-K’ (GA-K) platform sitting under the ES, and it's clearly more than hot air. Through twisting B-roads it remains balanced and predictable.

Even in non-F-Sport variants the car points nicely and will steer accurately on the throttle through constant radius corners, with only modest body roll. The ES doesn't feel like a front-wheel drive car, with neutral handling up to an impressively high limit.

Luxury and Sports Luxury grades are offered with three drive modes - ‘Normal’, ‘Eco’ and ‘Sport’, tweaking engine and transmission settings for economy or a more spirited drive.

ES 300h F Sport variants add three more modes - ‘Sport S’, ‘Sport S+’ and ‘Custom’, further revising engine, steering, suspension and transmission characteristics.

Despite all the tuning options, road feel is not the ES's strongest suit. Dialing in sportier modes will add steering weight but no matter what the setting, the connection between the front wheels and the driver's hands is less than intimate.

The CVT auto suffers some of that disconnect between road speed and revs, the engine moving up and down the rev range in search of the power/efficiency sweet spot. But wheel-mounted paddles allow for manual shifting through pre-set ‘ratio’ points, and that option works nicely if you prefer to take the reins.

And when it comes to slowing down the ‘Auto Glide Control’ (ACG) system smooths out regenerative braking when you're coasting to a stop.

The conventional brakes are ventilated (305mm) discs at the front and a solid (281mm) rotor set-up at the rear. Pedal feel is progressive and outright stopping power is strong.

Random notes: The front seats are great. Super-comfortable yet neatly bolstered for secure location. The F Sport's chairs, even more so. The new multimedia touchscreen is a winner. It looks good and menu navigation is agreeably straight forward. And the digital instrument cluster is similarly clean and clear.

The Lexus ES scores a maximum five-star ANCAP rating, the car first assessed in 2018, with updates in 2019 and September 2021.

It received high ratings against all four key criteria (adult occupant protection, child occupant protection, vulnerable road user protection, and safety assist systems).

Active crash-avoidance technology on all ES models includes, a pre-collision safety system (Lexus-speak for AEB) active from 10-180km/h, with pedestrian and daytime cyclist detection, dynamic radar cruise control, road sign assist, lane tracing assist, fatigue detection and reminder, tyre pressure monitoring, a reversing camera, as well as rear cross-traffic alert and parking support brake (including an intelligent clearance sonar).

Other features like blind-spot monitoring, adaptive high-beam and a panoramic view monitor are included on F Sport and Sport Luxury grades.

If a crash is unavoidable there are 10 airbags on-board - dual front, driver and front passenger knee, front and rear side airbags and side curtain airbags covering both rows.

There's also an active bonnet to minimise pedestrian impact injuries, and ‘Lexus Connected Services’ includes an SOS call (driver-activated and/or automatic), and stolen vehicle tracking.

For child seats there are top tethers for all three rear positions with ISOFIX anchors on the outer two.

Kia remains a shining light in terms of its new-car-ownership promise, with a very strong seven-year/unlimited kilometre warranty. It makes a lot of sense if you plan to hang onto the car for a while. There's no extended warranty available, which is understandable.

That plan also includes a roadside-assist plan for the same seven-year period, provided you maintain your car with Kia Australia. So, given you get one year to start with, then you get an extra year of cover every time you go back to Kia to get your car serviced, you could end up with eight years of coverage. Nice!

Servicing is due every 12 months or 15,000km, with the first seven years covered by a capped-price-service cost / maintenance cost plan. The costs are: service one - $289; two - $466; three - $360; four - $559; five - $325; six - $599; seven - $345. That makes a total cost of $2943, which is competitive for its class. Keep your owners manual or logbook up to date, and your resale value should hold up better.

If you have concerns about common problems, issues, reliability ratings and durability, you should check out our Kia Optima problems page.

From the time it arrived in the Australian market just over 30 years ago Lexus has made the ownership experience a key differentiator for the brand.

Its focus on post-purchase benefits and ease of servicing shook the established luxury players out of their button-backed leather lounge slumber and into a new aftersales mindset.

That said, the Lexus standard four-year/100,000km warranty is some way off luxury newcomer, Genesis, as well as traditional heavyweights Jaguar and Mercedes-Benz, all at five years/unlimited km.

Yes, Audi, BMW and others are at three years/unlimited km, but the game has moved on for them, too. Plus, the mainstream market standard is now five years/unlimited km, with some at seven, even 10 years.

On the other hand, the ‘Lexus Encore Privileges’ program provides 24-hour roadside assistance for the duration of the warranty, as well as, “dining, hotel partnership and luxury lifestyle experience offers exclusive to owners of new Lexus vehicles.”

The Lexus Enform smartphone app also offers access to everything from real-time advice on events and the weather to nav destinations (restaurants, businesses, etc), and more.

Service is scheduled every 12 months/15,000km (whichever comes first), and the first three (capped price) services for the ES are $495 each.

A Lexus loan car is provided while your pride and joy is in the workshop, or a pick-up and return option (from home or office) is available. You'll also receive a complimentary wash and interior vacuum.