Mercedes C-Class Coupe vs Lexus RC

Buying a coupe doesn’t mean you have to sacrifice efficiency for style, nor must you prioritise performance at the expense of practicality, either.

A growing band of sleek four-seaters balances relatively small bills while attempting to deliver driving thrills, too. The latest is Mercedes’ C-Class Coupe, and here we’re testing it in C 250d form. With the maker’s 2.1-litre diesel engine, it serves up svelte styling, punchy performance and sound efficiency.

You might not think diesel goes hand-in-hand with the image of a premium coupe, and neither does Lexus. Instead of developing these engines, the brand uses its petrol-electric hybrid powertrains to achieve impressive on-paper efficiency. Although our pictures show a Premier model, we've lined up its RC 300h coupe in racy F Sport guise for this test in a head-to-head battle with our AMG Line-spec Mercedes.

To take road test victory, the winner will have to balance all the attributes we’ve mentioned, combining the driving experience with running costs and mixing practicality with performance. But do the plaudits go to the diesel Mercedes or the hybrid Lexus?

Head-to-head

Styling

Looks are important to coupe buyers – even more so for economical models such as our duo here. The Mercedes is curvier, with softer surfaces and more organic forms contrasting with a few creases. The Lexus is simply sharp from front to back, but both models are definitely striking designs appealing to the same audience.

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Engines

Despite its petrol-electric drivetrain, the RC still isn’t as clean as the diesel C-Class. However, our fuel figures show both offer respectable efficiency for sporty-looking coupes. While the Mercedes’ engine lacks the Lexus’ refinement, it’s nicer to drive – helped by the nine-speed automatic transmission. 

Ownership

Coupes need to deliver a more emotional ownership experience – especially from these premium brands. The C-Class is pleasant inside, but the RC’s build quality is more solid, while Lexus’ Driver Power performance makes it a strong long-term bet.

Verdict:

First place: Mercedes C-Class Coupe

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Victory is snatched from the Lexus by a convincing margin here. Neither car is brilliant to drive, but the C-Class gets more equipment, will be cheaper to own and run plus offers extra practicality over the RC. Also, its diesel engine serves up more performance, while the smooth nine-speed auto is better suited to this type of car, aiding both long-distance cruising and driving around town.

Second place: Lexus RC

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The RC proves Lexus is as competitive as it’s ever been alongside its German rivals, yet even with these frugal two-doors the model is lacking a depth of ability compared with the Mercedes. The powertrain is refined but loses out to its competitor on efficiency and performance, while the cabin isn’t as versatile, either. Also, its fussy looks won’t be to everyone’s tastes.

Is it worth waiting for this model?

Audi A5 2.0 TDI S line auto

Due: Autumn Price: £37,500 (est)Engine: 2.0-litre 4cyl, 187bhp 

Used - available now

2015 Audi

Q7

124,169 milesAutomaticDiesel3.0L

Cash £8,495

View Q7

2016 Volvo

V70

93,748 milesAutomaticDiesel2.0L

Cash £9,495

View V70

2021 Ford

Fiesta

34,985 milesManualPetrol1.0L

Cash £10,549

View Fiesta

2021 Ford

Focus ST

38,080 milesManualDiesel2.0L

Cash £17,049

View Focus ST

The BMW 420d is another option here, but if you want the latest coupe around it’ll have to be the Audi A5. It follows the A4 saloon by blending gently evolved styling with efficiency, performance, refinement and a classy interior.

Figures