Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Spied on the street: Porsche Panamera

Yes, Porsche has given up several official photos of the Panamera sedan ahead of the car's expected official rollout at the Shanghai auto show in late April. That means prototypes on the road have stripped off the camouflage. But it's still interesting to see the car in a natural setting.

Mercedes-Benz CL gets a facelift for 2011

Three years after its introduction, Mercedes-Benz has given the CL a mid-cycle facelift, providing the big two-door with lightly altered bumpers--those up front with new LED daytime running lamps, reshaped headlamps, a more contoured hood, larger exterior mirrors with integrated indicators and revised tail-lamp lenses, among other detailed visual changes. More significant than the styling tweaks, however, are the changes underneath the hood, with the arrival of a new twin-turbocharged 4.6-liter V8 direct-injection gasoline engine--the first of Mercedes-Benz's advanced MoVe powerplants that aim to bring efficiency gains to its lineup. With 429 hp and 516 lb-ft of torque, the new engine delivers 47 hp and 125 lb-ft more than the naturally aspirated 5.5-liter V8 it replaces in the four-year-old CL500--enough to lower the luxury coupe's 0-to-62-mph time by 0.5 second to 4.9 seconds.

Bugatti’s 254mph Veyron Vitesse officially world’s fastest drop-top

The Bugatti Grand Sport Vitesse has been officially confirmed as the world’s fastest open-top production car, having been clocked at 254.04mph. The milestone will be celebrated (naturally) with a limited run of special ‘World Record Edition’ Grand Sport Vitesses (which has been on sale since January 2012), with the commemorative cars sporting orange flashes to the carbonfibre bodywork, and orange wheels. Bugatti Veyron Grand Sport Vitesse: a 250mph wind in your hair Bugatti admits that the initial open-top speed target for the Bugatti Grand Sport was a piffling 233mph.