Possible Clues:

• Ridiculous car Tatler chose as one for the smart set?
• Character stole awfully large car
• Dodgy character stole a 4x4?
• Huge 4WD car, the real cost laughable?
• Sadly, the last race in my 4x4?
• Large vehicle has this accelerator modified — one gets going
• The energy-saving accelerator's specially developed for this vehicle?
• The car out of place around London school, one offering performance?
• What's replaced a horse and cart etc around west side of London?
• Cash wanting as monstrous car eats petrol -- that's taking the pee!