Some good videos:
Westfield 1600 vs Caterham Roadsport
The Westfield 1600 takes the Mazda MX-5's engine and gearbox, the baby Caterham Roadsport uses a Ford Sigma engine. How do they match up on track?
Subaru Impreza RB320
The most hardcore UK Impreza STi tackles Cadwell Park at extreme pace
Caterham R400 takes on Ariel Atom
The meatier Cosworth-engined Caterham races the force of nature that is an Ariel Atom
Aston Martin V8 Vantage N24
A positively brutal lap of the track in the lightweight race-spec Aston Martin V8 Vantage N24
Morgan Aero 8
The Morgan Aero 8 may represent bygone motoring, but with 333bhp and great traction, it's as thrilling as any of the other contenders on track
Renault Megane R26 vs SEAT Leon Cupra
Two of the more everyday contenders duel on the track in the shape of the Renault Megane R26 and SEAT Leon Cupra
BMW Z4 M Coupe
The Z4 M may not quite be the finished article, but BMW's Coupe handles Cadwell Park with aplomb as it chases the Impreza RB320
Porsche 911 GT3 RS
Arguably the best drivers' car in the world, attacking Cadwell Park in the hands of the evo test team. 'Nuff said.