Skip advert
Advertisement

Porsche Boxster S vs rivals

Porsche’s brilliant new Boxster faces roadster rivals from Mercedes and Audi in its first test

Porsche Boxster S vs rivals

The new Boxster has hit the UK just in time for summer, and unlike the British weather it promises to be hotter than ever.

Porsche claims it’s the biggest leap forward in the roadster’s illustrious history. It’s longer, wider and lower than the car it replaces, and its flat-six engine is more powerful yet cleaner and more efficient than before. We test the 3.4-litre Boxster S, with the standard six-speed manual box, against two talented rivals. 

Advertisement - Article continues below

First up is the mighty Mercedes SLK 55 AMG. With its thundering V8 engine, uprated chassis and neat folding hard-top, the range-topping roadster is one of the most desirable two-seaters on the road. Equally exciting is the Audi TT RS, which combines a muscular five-cylinder turbo engine with the brand’s trademark four-wheel-drive transmission.

Each of these cars takes a different approach to delivering high-performance, open-air motoring pleasure, but on paper they’re closely matched, so this is sure to be a fierce contest. We headed to the open roads of Lincolnshire to find our winner.

Verdict

Let’s start with the least surprising news you’re likely to read this week: the new Porsche Boxster S wins this test.

It looks fantastic and is quite simply one of the finest-handling cars money can buy. It’s beautifully engineered, the cabin is first rate, while the roof is well insulated and folds fast. 

Skip advert
Advertisement
Skip advert
Advertisement - Article continues below

Used - available now

Boxster

2016 Porsche

Boxster

48,800 milesAutomaticPetrol2.7L

Cash £26,995
View Boxster
Boxster

2016 Porsche

Boxster

50,000 milesAutomaticPetrol2.7L

Cash £25,995
View Boxster
Boxster

2016 Porsche

Boxster

34,000 milesAutomaticPetrol3.4L

Cash £45,995
View Boxster
Boxster

2016 Porsche

Boxster

3,632 milesAutomaticPetrol3.4L

Cash £58,495
View Boxster

More surprising is the fact that three roadsters, with completely different engine, drivetrain and chassis concepts, can have such closely matched performance – and that makes it difficult to pick a runner-up.

The Audi and Mercedes have great engines, and combine punchy acceleration with great soundtracks. But the TT RS just comes up short. Without the optional magnetic dampers, the ride is too firm, while the inert handling holds it back in terms of fun. The SLK 55 isn’t as engaging as the Porsche, either, but it’s more comfortable than the TT, and its mighty AMG engine is impressively clean and fuel efficient. 

Ultimately, though, neither rival comes close to troubling a car that continues to set standards in the roadster market. The Boxster is simply brilliant.

Winner: Porsche Boxster S ★★★★★

The Porsche Boxster is our Roadster of the Year – and it’s not hard to see why. The S model offers all the performance you could need and is a joy to drive, plus is practical, comfortable and refined. It’s a talented all-rounder. The fact it’s the cheapest car in this test is the icing on the cake. 

2nd: Mercedes SLK 55 AMG ★★★★

Some people demand a metal roof and the SLK meets that need. The styling is a bit uninspiring, but the new 5.5-litre AMG engine is surprisingly efficient, while losing none of the thunderous character and performance buyers expect. The Mercedes is expensive in this company, though.

3rd: Audi TT RS Roadster ★★★★

We’re big fans of lesser versions of the TT Roadster, but while the five-cylinder engine in the RS sounds great and the quattro all wheel drive delivers surefooted grip, this expensive car is no junior R8 and doesn’t have the dynamic magic to rival the Boxster S.

Skip advert
Advertisement

New & used car deals

Porsche Boxster

Porsche Boxster

RRP £43,720Used from £25,995
Renault Clio

Renault Clio

RRP £16,260Avg. savings £4,179 off RRP*Used from £6,595
Dacia Spring

Dacia Spring

RRP £14,995Avg. savings £3,158 off RRP*
MG MG4

MG MG4

RRP £27,005Avg. savings £10,454 off RRP*Used from £12,791
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

Mitsubishi is back! Japanese brand to return to the UK in 2026
Mitsubishi Eclipse Cross cornering

Mitsubishi is back! Japanese brand to return to the UK in 2026

Five years after quitting the UK market, Japanese giant Mitsubishi Motors will be returning, thanks to IM Ltd
News
17 Nov 2025
New Renault Trafic E-Tech van gets sci-fi looks and 280-mile range
Renault Trafic - front

New Renault Trafic E-Tech van gets sci-fi looks and 280-mile range

The production version of the new mid-sized Renault Trafic van has been revealed and it will hit showrooms later in 2026
News
18 Nov 2025
Want the best used car? Take a good look at the previous owner
Opinion - owners

Want the best used car? Take a good look at the previous owner

Auto Express’ senior content editor explains why some good old-fashioned detective work can help you find the very best second-hand buy
Opinion
16 Nov 2025