Engine Blown up

I am looking for advice into solving my dilemma. My car was bought new (Jan 2005)from a dealer and has a full service history by Hyundai dealerships with only 51438 miles done.(Sep 2010)

Whilst driving, the car started to excessively overrev (6500rpm) and was driving of its own accord which needed both feet on the break to halt it and had to be swithced off (ignition) for it to stop driving. Apparently on a Hyundai diagnosis inspection the High Pressure Fuel Pump looks to have failed and caused fuel to feed directly into the engine (15 litres of diesel drained from 1x cylinder and causing catastrophic engine failure. Hyundai have stated that an engine, turbo, HPFP and Injector pack are rquired at a cost of £7400(including labour). The car is only 9 months over the warranty date although nearly 10000 miles below the warranty mileage. Do I have a case against Hyundai to solve this issue as they have only offered £160 goodwill gesture.