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

BMW's N20 engine--four cylinders, more power

More power, greater torque, reduced fuel consumption, lower tailpipe emissions and less weight--but better? Before driving the BMW X1 xDrive28i, the first model to feature the German carmaker's new turbocharged 2.0-liter four-cylinder gasoline engine, we weren't so sure. The new engine, known as the N20 and set to lead a return of four-cylinder BMW models to North America for the first time since 1998, has been conceived to (indirectly) replace the company's long-running naturally aspirated 3.0-liter inline six-cylinder.

Mercedes SLS AMG Roadster Configurator Live

The Mercedes SLS AMG Roadster Configurator - while away the hours... This last month, and in particular the last ten days, the Mercedes SLS AMG Roadster has cropped up here on an almost daily basis. We got the first official - but slightly disguised – photos of the SLS Roadster at the beginning of May, but by the end of the month we’d had the real deal of an official reveal with a gallery full of photos of the soft-top SLS.

Vauxhall Corsa now gets 85.6 mpg

The Vauxhall Corsa 1.3 CDTI ecoFLEX Start/Stop now achieves 85.6mpg with emissions of just 88g/km.  The Vauxhall Corsa –  and, for that matter, the Opel Corsa – has been revealed as the most economical car ever built by GM Europe after a series of tweaks has cut its already impressive fuel consumption. The Corsa 1.3 CDTI ecoFLEX Start-Stop )which, fortunately, isn’t emblazoned on the boot lid in full) can now squeeze 85.6 miles out of every gallon of diesel, which means emissions drop to just 88g/km. Vauxhall has had yet another play with their 1.3 litre diesel and fitted a variable displacement oil pump that delivered pressure to suit the load, had a tweak with the Corsa’s brain and filled low-viscosity oil in the gearbox  The result is in improvement of 7 per cent in economy over the current Corsa.