Audi A3 vs Mercedes-Benz A45
What's the difference?

Audi A3

$42,999 - $69,990

2025 price

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Mercedes-Benz A45

$49,900 - $69,800

2020 price

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Aston Martin Vanquish

Mercedes-Benz A-Class

Mercedes-Benz C-Class

Mercedes-Benz C43

Mercedes-Benz C63

Mercedes-Benz CLA

Mercedes-Benz CLA-Class

Mercedes-Benz CLS-Class

Mercedes-Benz E-Class

Mercedes-Benz E53

Mercedes-Benz EQS

Mercedes-Benz S-Class

Mercedes-Benz SL-Class

Summary

2025 Audi A3

2020 Mercedes-Benz A45

By Chris Thompson

By Laura Berry

Safety Rating

Engine Type

Turbo 4, 1.5L

Turbo 4, 2.0L

Fuel Type

Premium Unleaded Petrol

Fuel Efficiency

5.3L/100km (combined)

8.9L/100km (combined)

Seating

Likes

Premium style and feel
Capable and flexible on-road
Value against rivals

310kW from a four cylinder!
Outstanding performance, but not spine destroying
Hatch practicality

Dislikes

Ride is a bit stiff
Back seat is tight
Lacks some modern features

Rear head- and legroom limited
Looks a bit too low-key without the aero pack
Can be thirsty

2025 Audi A3 Summary

Can a hatchback still be a fun and fashionable way to get around when the SUV has become such a status trend?

The facelifted Audi A3 certainly makes a case for it.

The refreshed 2025 A3 is, as Audi puts it, more competitive than before when it comes to not only value but also, you might agree, style.

Last year, before the update even arrived, the A3 sold almost as well as its Volkswagen Golf corporate sibling. In fact, it’s Audi’s third most popular model behind the Q3 and Q5 SUVs.

It’s also third in its segment of ‘Small cars under $40,000’, behind only the MG4 electric car and, you guessed it, the VW Golf.

As such, it also outsells its actual closest rivals the BMW 1 Series and Mercedes-Benz A-Class, both of which are close to the A3 on price.

Now that it’s been given a bit more razzle dazzle, let’s see if the A3 can keep that momentum going.

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2020 Mercedes-Benz A45 Summary

Driving the first-generation Mercedes-AMG A 45 in 2013 was an intense, noisy, brutal experience and I loved every bone-shaking, ear-bleeding moment of it.

But I’m older now, married and have children, and while this is also an intense, noisy, brutal experience I now prefer cars to be less like a 24-hour, seven-day-a-week continuous cage fight. So, I was surprised to find the new-generation A45 S has grown up a bit, too.

So, like me, is the new Mercedes-AMG A 45 S 4Matic+ not as quick as it used to be, and does it have a dad bod, now, too? Far from it. If anything, it’s matured into the serious weapon of a hot hatch it was always supposed to be.

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Deep dive comparison

2025 Audi A3 2020 Mercedes-Benz A45

Verdict

Closing in on $60,000 for a small car isn’t cheap. Ask a car dealer and they might even say the hatchback is a good way to get someone into a showroom to eventually look at an SUV.

But I reckon you’d be doing the A3 a disservice to count it out. It’s always been one of those cars that does everything well, and with this current facelift manages to keep its practicality without becoming boring.

It looks good on the outside, it’s smart on the inside and it’s fun to drive while remaining sensible. Even if you get it in bright yellow.

Verdict

The Mercedes-AMG A 45 4Matic+ may have grown up a bit in that it’s not as noisy or uncomfortable as the first-generation version which arrived in 2013, But if anything, its more portent than ever. Superb Mercedes-AMG craftmanship, outstanding performance and good value as far as bang for your buck goes.

Audi A3 vs Mercedes-Benz A45 What's the difference?

Summary

Deep dive comparison

Verdict

Verdict

Audi A3 vs Mercedes-Benz A45
What's the difference?