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Porsche 928 1977-1994: buyers guide

  • By Graham Smith
  • Herald Sun
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Graham ?Smithy? Smith reviews the Porsche 928 1977-1994, its fine points, its flaws and what to watch for when you?re buying it.

Porsche enthusiasts rejected the 928 because it wasn’t true to Porsche tradition with its water-cooled front-mounted engine affecting resale value on the used car market today.Used Porsche 928 prices tend to hover around the mid-$20,000 range the front-engine Porsche supercar is a super buy.

MODEL WATCH

The 928 first appeared on the scene in 1977, when it was a shock to Porsche traditionalists who refused to accept that a car with a water-cooled engine mounted in the front for heaven’s sake could carry the Stuttgart sports car maker’s badge.

Porsches had always had air-cooled engines mounted in the back, and despite the inadequacies of that layout, like quirky handling as a result of the pendulum effect caused by the mass of the engine hanging way out behind the rear axle, Porsche fans would have it no other way.

So adamant were they that Porsche eventually admitted defeat and returned to its roots with a rear-engine, and in the case of the Boxster, a mid-engined layout.

If you were prepared to ignore the traditionalists you’d find that the 928 was a true supercar, and one that has few peers even today.

With a 4.5-litre single overhead camshaft all-alloy V8 pumping out 176 kW mounted under the alloy bonnet, driving through a three-speed auto or five-speed manual gearbox, the 928 would accelerate from standstill to 100 km/h in less than seven seconds, and reach a top speed well in excess of 220 km/h.

Underneath the sleek two-plus-two body was independent suspension front and rear, the rear boasting a unique self-steering feature that made a significant contribution to the 928’s impeccable road manners.

the original 928 gave way to the 928S in 1980, which can be readily identified by its front and rear spoilers, and 16-inch wheels. Other improvements under the skin saw the engine grow to 4.7 litres and output to 221 kW, while slotted front brake rotors and air ducting provided some much needed improvement to the braking which had come in for criticism on the original 928.

A four-speed auto replaced the earlier three-speed in 1984 to make it a more lively car off the line, and in 1985 the manual was updated to a much more user-friendly five-speed unit.

A new dual overhead camshaft 5.0-litre engine was fitted from 1986. Able to run on low-octane unleaded fuel its output dropped to 212 kW. At the same time Porsche further upgraded the 928’s brakes with four-piston callipers all round and ABS for the first time.

The 928S4 arrived in 1987 with a more rounded shape and a separate hinged rear spoiler. The front spoiler had been deleted and if you cared to look underneath you’d discover ground effect panelling.

Power was back to 221 kW, the brakes were again upgraded with larger front callipers and wider, eight-inch, wheels were fitted to the rear.

The 928GT was released in 1989 and power climbed to 242 kW among a raft of changes. Porsche’s acclaimed PSD Porsche Slip Diff was fitted from 1990.

The final fling before Porsche killed off the 928 in 1995 was the GTS, which was launched in 1992. By the time it vanished from Porsche showrooms the power was a mighty 257 kW, it had huge brakes, and just about every feature you could imagine.

In its final guise the 928 would accelerate to 100 km/h in less than six seconds, and reach a top speed of 270 km/h. It was a supercar in all senses of the term.

ON THE LOT

Porsche imported a total of 1319 928s in the 14 years the car was sold here. Because it was a Grand Tourer in nature, most were sold with the automatic transmission.

Early 1970s 928 models can be found for less than $15,000. Spend $25-$35,000 and you’ll find a nice S4 from the mid-1980s, which is probably the pick of the bunch. If you’ve got a bundle of cash burning a hole in your pocket you can step up to a 1994 GTS for $60-$70,000.

IN THE SHOP

The 928 was a techno tour d’force, a true supercar that will deliver exhilarating performance, but while it now comes at a quite reasonable purchase price there is a sting in the tail, and that is the cost of maintenance. Regular servicing is a must, and it’s not cheap.

The engine itself is generally bulletproof, it will last forever without wearing out, but the engine ancillaries require regular attention.

The camshaft belt requires changing every 40,000 km; if you don’t you run the risk of it breaking and when that happens you’re likely to do considerable damage to the engine’s internals.

Oil leaks are a problem and can be expensive to fix. The most common from the engine are from the cam housings, the front and rear camshaft seals, and the crankshaft seal. Oil leaks from the power steering rack are also common.

Brake wear can also be high. Replacement of pads after 10,000 km is not uncommon, and discs need replacing at around 20-30,000 km depending on how hard you work them.

Early cars, which had K-Jetronic fuel injection up to 1983, suffered with the accumulation of deposits on the inlet valves and poor cold running which will require the removal of the intake manifold and the blasting of the valves.

Gearboxes, diffs and the chassis are pretty much trouble free, as is the body which was a combination of alloy panels and galvanised main structure so it doesn’t suffer from rust.

Electrical switches and controls, like air-conditioning controls, tend to be unreliable and can require regular replacement.

Check service records as many owners wouldn’t pay the price of ownership, and be aware that some owners get their cars serviced at reputable service outlets just to get their book stamped, and don’t always have all the repairs done that they should. As a result there are some cars out there that need a lot of money spent on them.

LOOK FOR

• Awesome road performance

• Impeccable handling and road manners

• There’s nothing like a Porsche badge

• Inadequate brakes for the performance on early cars

• High maintenance costs

RIVALS

BMW 840i 1993-1999 $49,000-$95,000

Mercedes-Benz 500SL 1990-1993 $64,000-$87,000

Comments on this story

Displaying 3 of 7 comments

  • Getting back to my friends 1993 Porsche GTS. This car had only done 87000 ks when the front thrust bearing failed causing severe damage to the internals of the engine. Apparently this is a common problem with these engines. New camshafts cost 1,500 dollars each. New pistons were 5,000 dollars a set .Second-hand engine block 10,000 dollars. This engine had come from Japan and had done the same mileage. The only thing that could be used was the block. Camshafts and other parts were unusable due to excessive ware at this low mileage. My friends GTS had an excellent service history that?s why he bought it. It looks like a new car. Just goes to show that buyer beware. Quote to repair auto transmission approx. 5, 000 dollars.

    james taylor of kurmond nsw Posted on 20 July 2011 6:29pm
  • I have a friend who has a 1993 porsche gts. The car cost 85000 dollars and so far he has spent over 100,000 dollars to keep this car serviced and running right. Just recently the motor blew up and now the auto transmission is cactus. The motor cost 36,000 to rebuild. So much for people saying they have a bullet proof motor and a good transmission.

    james taylor of kurmond nsw Posted on 20 July 2011 5:12pm
  • I was surprised when looking for mine that the sellers seemed reluctant to sell... 'Do these guys really want to sell their car?' I thought but now being in the same position I understand why. They are a car you don't want to sell, you'll know why once you own one.

    Jamie Hooton of Elwood, Melbourne Posted on 14 June 2010 8:03pm
  • I have been looking at the availability of a 928 GTS in Australia and have been disheartened by the lack of models and the outright greed of some of the sellers. there was an honest chap in Melbourne who was selling for $70k a quality version i still kick myself for not looking at further, but there is a scamp on this very site in fact who is trying to sell (it may be low mileage for a 15 year old car) one for $99k. Obviously not interested in selling it quickly then.

    WizardsLore of Sydney Posted on 04 May 2010 12:48pm
  • Rick - the S4 you drove must have had problems or it was an auto that you didn't put your foot down in (they start off in second gear & can appear sluggish at first) if it was slower than your Outback. My everyday drive is a 2002 Subaru Liberty wagon and my second car for country trips is a 1990 928 GT (only made in a manual version) - truly an amazing car even today. I looked at boxters but they just simply didn't have the same performance and were more show than go in my opinion. Cheers, Jamie

    Jamie Hooton of Melbourne Posted on 12 April 2010 2:16pm
  • I read an article about 15 years ago whick likened the maintenance and build to an onion, if one thing went wrong (most ancillaries are vacuum operated) you had to remove many layers to find/ fix the inevitable problem.
    very costly if not maintained correctly.
    in fact it stated specifically if you could pick one up for under 10K you would generally need to spend that amount again to get it up to speck. I took a S4 for a test drive in sydney from a dealership (impeccable condition) and my subaru outback (wagon) had twice the power.
    I ended up buying a boxster 97 model, much less hassle in the maintenance better looks (personal tastes) and much better handling and performance for the same price.
    sorry fans of the 928.

    Rick Fry of Branxton Posted on 06 October 2009 11:37am
  • the 928 is an awesome car and one of the most beautiful of all time.It still looks like a new car which is a testament to its timeless design…fantastic!

    Matt Wilkinson of Sydney Posted on 10 July 2009 11:27am
Read all 7 comments

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