According to Official Guinness Records,
The fastest compressed air powered car reached a speed of 129.2 km/h (80.3 mph), achieved by the Toyota Industries Corporation Dream Car Project (Japan), at the Japan Automobile Research Institute, Shirosato Test Center, Ibaraki, Japan, on 9 September 2011.
Final speed taken from a timed average from two runs. Vehicle used three compressed air cylinders powering a twin-scroll air engine.
For a complete list of 2011 records, please visit 2011 Guinness Records in Japan.