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

New BMW M3 and M4 engine secrets laid bare

BMW's M division has lifted the veil of secrecy on the inline six-cylinder engine bound for its upcoming M3 sedan and new-to-the-range M4 coupe and convertible, revealing a potent twin-turbocharged 3.0-liter direct injection gasoline unit that produces an official 424 hp at 7,500 rpm and what officials describe as "significantly more than 369 lb-ft" of torque. The newly developed engine, known under the internal codename S55 B30, shares its 84.0 mm bore and 89.6 mm stroke with BMW's standard turbocharged 3.0-liter in-line six-cylinder direct-injection gasoline mill, the M55 used across the German car maker's lineup, endowing the aluminum block unit with an overall swept volume of 2,979 cc. This represents a sizeable 990 cc reduction on the engine BMW's M division's new unit replaces, the S65.

Audi TT goes SUV: offroad concept revealed in Beijing

Audi has revealed a bold TT crossover SUV at the Beijing Motor Show – and the offroad concept looks so complete and production-intent, we wouldn’t bet against this concept becoming a showroom reality sooner than we think. Audi’s technical boss Dr. Ulrich Hackenberg admitted at the big China show that the TT offroad concept was “a glimpse of how we might imagine a new model in a future TT family”, and that last word is crucial: this is the first clear sign that the TT is going to turn from a single model into a range of cars in its own right.

BMW and Toyota plan engine-swap deal, reports say

Details have begun to emerge about a planned engine-swap deal between BMW and Toyota. Set to be made public at the Tokyo motor show this week, the cooperation is said to center on BMW supplying Toyota with four- and six-cylinder common-rail diesel engines for use in a wide range of models. In return, Toyota plans to provide BMW with technology used to combine combustion engines and electric motors in various hybrid applications.