Autocar’s Steve Sutcliffe compares two cars with pretty similar performance statistics, but perhaps designed to cater for two different demographics: BMW’s 340 bhp 1 Series M Coupe and the 330 bhp Porsche Cayman R. Both hit 100 km/h in a whisker under 5 seconds, but the BMW is limited to 250 km/h while the Porsche keeps going until 282 km/h. Plus, at 69,830, it also costs almost €20,000 more than the BMW…