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

Why the BMW M4 is better than the M3 V8 (2013)

It’s no exaggeration to say that the turbocharged engine in the upcoming BMW M3 (saloon) and M4 (coupe) models is one of the most important engines ever produced by BMW’s M Division. No, it’s not the first turbo lump the performance off-shoot has built – you'll probably know we’ve already had the X5/X6M mutants plus the brilliant 1M and M5 and M6 – but it is the first turbo ever to slot in a production M3, the car that personifies BMW’s iconic performance sub brand, which itself has always been defined by high-revving, naturally aspirated engines. All of this explains why M’s engineers have cut their teeth on other engines first before plucking up the courage to develop the M3/M4 turbo while turning their backs on the outgoing E92 M3’s exceptional V8.

Mercedes E63 AMG (2011) gets twin-turbo V8

Mercedes has updated the E63 AMG super saloon with a range of minor tweaks, and one major one. Say goodbye to the 6.2-litre naturally-aspirated V8 engine which heralded the '63' badging, and hello to another downsized, forced-induction response to tightening emissions and economy requirements. The 2011 E63 receives the twin-turbo 5.5-litre V8 engine first seen in the S63 AMG, and now powering the CL63 and CLS63 as well. So the Mercedes E63 AMG is actually an E55 AMG?

Motorists to set own speed limits in Australia?

You can always rely on the subject of speed limits to result in a heated debate. We only need highlight the recent furore over the government’s plans to introduce a 60mph limit on a 32-mile section of the M1 to make our point. But how about a scenario where you, the motorist, select the appropriate speed limit?