BMW 325is Alpine

“But the 325iS was naturally aspirated”, I hear you say! That’s correct, but the Alpine conversion added a turbocharger, and the results were rather impressive. There was a 50 per cent increase in torque (399 N.m at 4 000 r/min) and 36 per cent increase in power (210 kW at 5 500 r/min). The increase ...