Skip advert
Advertisement
Group tests

Audi RS5 vs BMW M4 vs Mercedes-AMG C63 S - Supertest review

The Audi RS5 meets its arch rivals, the BMW M4 Competition Pack and the Mercedes-AMG C63 S for an evo supertest.

BMW’s M4 has been refreshed and the new Audi RS5 does the numbers to put the frighteners on a full-blown supercar, but can either see off the Mercedes-AMG C63 S? Over 3000 miles on road and track the evo supertest provided the answer.

The new RS5 is 60kg lighter with a 444bhp twin-turbocharged 2.9-litre V6 in the nose replacing the old V8. It’s mated to an eight-speed automatic gearbox and a faster-reacting four-wheel-drive system.

Advertisement - Article continues below

The M4 has the £3000 Competition Package, which adds 19bhp to the familiar blown straight-six for an RS5-equalling 444bhp and also brings stiffened and lowered suspension, thicker anti-roll bars, adaptive dampers and an additional front splitter.

The Mercedes-AMG C63 S is the most powerful of the lot, harbouring a 4-litre twin-turbo V8 with headline figures of 503bhp and 516lb ft that leave the Audi and BMW looking a little undernourished. This is shaping up to be a bruising encounter.

The plan is for this supertest is fairly simple on paper, but it promises to be gruelling in practice. First we’ll hit the road for a two-day tour of some of the most testing tarmac Yorkshire has to offer, then we’ll visit Millbrook Proving Ground to run performance figures, before finally heading to Bedford Autodrome for some timed laps of the quick and challenging West Circuit.

You can pick up evo 240 for the full drive story and get our individual verdicts on each car by reading our reviews but below we’re bringing you the edited highlights as RS5, M4 and C63 duke it out over a 3000-mile examination.

Audi RS5 vs BMW M4 vs Mercedes-AMG C63 S Supertest

Click the links below to jump to the supertest data and track test sections, then get the final verdict.

Read the full reviews

Audi RS5BMW M4Mercedes-AMG C63

This evo Supertest appeared in full in evo 240. Subscribe to evo here for the next in the Supertest series.

Skip advert
Advertisement
Skip advert
Advertisement

Most Popular

Audi RS5 review – Audi Sport's super estate eyes the BMW M3 Touring
2026 Audi RS5
Reviews

Audi RS5 review – Audi Sport's super estate eyes the BMW M3 Touring

Hybrid power provides Audi’s new super estate with a class leading 630bhp, but it comes at a price. Well two actually
2 Mar 2026
The new Audi RS5 looks good, but these used fast estates cost a fraction of the price
Used fast estate cars
Best cars

The new Audi RS5 looks good, but these used fast estates cost a fraction of the price

The new RS5 Avant is a hit, but if you don’t have £90k to spare these used alternatives offer impressive performance at a fraction of the price
27 Feb 2026
Save £24,000 on a new BMW M4 Competition – massive discounts on M’s flagship coupe
BMW M4 discounted
News

Save £24,000 on a new BMW M4 Competition – massive discounts on M’s flagship coupe

If you've thought about buying BMW's M4 coupe now might be the time. Current discounts make them as cheap as an M2
3 Mar 2026