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A closer look at the 2015 BMW M3 sedan and M4 coupe: Turbocharged performance is gonna cost you

By the time the 2015 BMW M3 sedan and M4 coupe were revealed at the Detroit auto show, we already knew a lot about what to expect from the Roundel's newest generation of high-performance driving machines. It was no secret, for example, that the new M3 sedan and its two-door counterpart, the M4, will be down two cylinders and a few hundred pounds from their predecessors. Now that we've had a chance to get a look at the cars in production trim, here's a closer look at what's under all the aggressively vented fascias, spoilers and M badges.

Stop-Start Freelander on the way

Land Rover has announced that it will be introducing stop-start technology on its Freelander range from May 2009, thus saving around 8% on the Co2 emissions, and taking the Freelander down a group on VED, which should help move a few more Freelanders off forecourts next year. The technology for the stop-start was developed in-house, with a new engine management system coming from Bosch and an uprated starter from Denso. The stop-start option will be available on the 2.2 TD4, which accounts for nearly half of UK sales.

Lamborghini Aventador

A clear evolution of both the Murcielago and the Reventon, the Aventador dissapointed and wowed in equal measure at its unveiling. Showcasing Lamborghini's newfound love for carbon fiber as well as an exhaustive list of new technologies for their road cars – such as a pushrod suspension – the Aventador certainly has a supercar-style spec sheet. The V12 engine used in the Aventador is also all-new and when combined with the lightweight carbon monocoque chassis is claimed to provide blistering performance, albeit in an unrevolutionary body.  More images of the Aventador, as well as the opinion of Chris Bangle, can be found through the links: Photo Gallery: Lamborghini Aventador Video: Chris Bangle on Supercars