Complex sentence: He helped Jeremy Clarkson test a Ferrari 575M against an Aston Martin Vanquish S on the fifth series of "Top Gear", and owns one of the final manufactured, air-cooled Porsche 911 Carrera 4s.
Split into simpler sentences: He helped Jeremy Clarkson test a Ferrari 575M against an Aston Martin Vanquish S on the fifth series of "Top Gear". Coogan drives one of the final air-cooled Porsche 911 Carrera 4s.