BMW has unveiled a lighter, more powerful version of its M3 performance saloon – the CS. Kitted out with a host of lightweight carbon fibre-reinforced plastic (CFRP) panels, the M3 CS aims to be sharper and even more engaging to drive than the standard car. Under the bonnet, you’ll find the same 3.0-litre twin-turbocharged six-cylinder engine as you’ll find in the regular M3, but it has had its power raised significantly from 503 bhp in the standard car to 542 bhp in the CS. Torque sits at 650 Nm and, when coupled with BMW’s xDrive all-wheel-drive system, this results in a 0-100 km/h time of 3…