BMW reveals one-off M5 CSL to celebrate the M5's 25th anniversary

The special M5 CSL was unveiled at BMW’s Nurburgring workshop, and celebrates the 25th anniversary of the M5 sports sedan. The biggest change has been to the engine, which has been increased in capacity from 5.0 to 5.5 litres, making it the M Division’s largest ever engine.

Other performance modifications include a carbon fibre manifold with an increased capacity air box and secondary oil cooler. An additional air duct has been created on the front spoiler to accommodate the new additions.

CSL stands for Compact Sports Lightweight, and as such, weight has been shed from the M5 CSL. The roof has been made from carbon fibre, and several interior parts have been discarded, like the rear seats, with the front seats being replaced by carbon fibre ones. The suspension has also been slightly modified, and total weight loss stands at 50kg.

M Division’s head of development Albert Biermann was quoted as saying that the BMW M5 CSL produces around 580bhp and 542Nm of torque, with the power being sent to the rear wheels via double-clutch M-DCT 7-speed gearbox.