
This is the first ever oil-burner to come from AMG, and it's a cracker. With 231bhp and 535Nm of torque, the 0-60mph dash is completed in a hot hatch-scalding 6.9 seconds. Top speed of this BMW 3-Series Compact rival is 153mph; yet tread lightly, and a near 40mpg average is on the cards.
On twisty country roads, the 3.0-litre engine's torque creates a recipe for amazing low and mid-range go. But the biggest surprise came at the test track, where the impressive power output means the Sports Coupί¿½ feels more like a V8-engined muscle car than a sporty diesel hatch.
Creating a sweet-handling machine such as this was not just a case of slotting in a new oil-burning unit and stiffening the suspension, though. AMG has reworked 95 per cent of the five-cylinder 20-valve 270 CDI motor. A longer stroke, larger turbo and a high-efficiency air- water intercooler system help to raise the output from 170bhp to 231bhp.
Even though this amazing motor will be used in the C-Class Saloon, Estate and Sports Coupί¿½ AMG, Mercedes says current potential sales are not sufficient to warrant right-hand-drive versions. More's the pity, as the C30 CDI AMG proves you can combine serious performance with good fuel economy.
Tell us about your car in our Driver Power survey.
For an alternative review of the latest Mercedes C-Class visit our sister site carbuyer.co.uk
For more breaking car news and reviews, subscribe to Auto Express magazine. We'll give you 6 issues for £1 and a free gift!