Stefan Faulhaber competes in Germany’s Berg-Cup hill climb series in a fast Opel Kadett C. The 780 kg (1719 lb) race car is powered by a 1.6 L inline-four making 255 horsepower at 10,400 rpm mated to a six-speed sequential transmission. The engine features a CDTI block from an Opel Meriva, Suzuki Hayabusa head, and tuned by Minichberger.
Source: Faulhaber Motorsport FB page, HillClimb Monsters, and Berg Fränky via Piotr