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

The BMW M5 is back!

BMW's M division has gone back to the drawing board with the M5, giving the fifth generation of the iconic four-door a twin-turbocharged 4.4-liter V8 engine—the first time Munich's class-defining performance sedan has gone without a naturally aspirated powerplant since its introduction in 1984. Further changes see it adopt a dual-clutch gearbox as part of a complete driveline rethink that resigns the old model's sequential manual transmission to the history books. Revealed here officially for the first time, the new M5 is planned to make its world debut in concept-car guise at the Shanghai motor show later this month.

Chevy Camaro Z/28 programmed with flying car logic

Most of the time when on a racetrack, or anywhere for that matter, you want to keep all four wheels on the ground. Sure, it's cool when a VW Golf gets a wheel up during an autocross event, still, it's less traction going to the ground for braking, accelerating or turning. But if you're really going for a hot lap, catching a little air is often par for the course.

BMW, Daimler experiment with upscale rent-by-the-ride

Two European luxury brands are tiptoeing into car sharing, a radical move for carmakers whose business for the past 100 years has been selling to individuals. German archrivals Daimler AG and BMW AG have launched sharing programs. The automakers say the move was prompted by changing attitudes about car ownership, especially among young buyers, and increased urban congestion.