The highest speed ever reached in a diesel-powered vehicle is 563.418 km/h* (350.092 mi/h), by Andy Green (UK) driving the JCB DIESELMAX at Bonneville Salt Flats, Utah, USA, on 23 August 2006. Wing Commander Andy Green broke his own record achieved the day before at a speed of 526.027 km/h (328.767 mi/h). *Pending FIA ratification
Official FIA record (TBC), set over flying mile.
Comments below may relate to previous holders of this record.