Santa Pod raceway, UK, 13/06/2003. Modified Astra GTE 8v versus Calibra turbo 4x4. Astra was stripped, with lowered final drive ratio, modified head with larger valves, Irmscher inlet manifold and 2.25" exhaust system. All this took the 1/4 mile time down from 16.4 to 15.2s. Calibra is obviouslly quicker off the mark, that's the benefit of four wheel drive.
