Chassis #: E21/R4/05
As Group 5 racing tourers, the BMW 320 models cut a dash with their heavily flared wheel arches and large front spoiler and rear wings.
Built in 1978 as the only 'lightweight' 320 completed by the factory and the last Group 5 320, it was to be driven by Hans Stuck and Formula 1 racing star Ronnie Peterson (who perished while driving a Lotus 78 in the 1979 Italian Grand Prix at Monza.). The car was used at only two events, Nurburgring and Silverstone before Peterson's death. Following the death of Peterson, 05 was sent to Jim Busby Racing in Laguna Canyon California to be run in IMSA GTX for the 1979 season. BMW Motorsport in Munich supported JBR as opposed to the McLaren cars that were sponsored by BMW North America.
Upon arrival to Jim Busby Racing the decision was made to strengthen and lighten the car by converting it to tube-frame. In addition, the engine, transmission and driver were moved back approximately 8 inches. Jim got the idea for the aero rear window after reading the IMSA rulebook realizing that it only specified that the stock rear window had to be retained. The new large window was created thereby cleaning up the airflow tremendously to the rear wing that was raised and moved rearward.
After Busby's time with the car it was sold to Frank Gardner in Australia. The car was initially driven by Allen Grice briefly but mostly by Jim Richards with good success. It was campaigned by a series of other owners into the late 1980s before being purchased and sent back to the states by an enthusiast who began a prolonged restoration. Jim Busby Racing was reunited with E21-R4-05 and completed the restoration in time for BMW's 100 year anniversary and feature mark at the 2016 Rolex Monterey Motorsport Reunion.