The McLaren MP4/5 and its derived sister model the McLaren MP4/5B were Formula One racing cars designed by the McLaren Formula One team based in Woking, England, and powered by Honda's naturally aspirated RA109E and RA100E V10 engines respectively. The MP4/5 was loosely based on its 1988 predecessor, the all-conquering MP4/4. McLaren used the new car for half of the 1989 season using the Weismann Longitudinal Transmission from the MP4/4, and the MP4/5B with the Weismann Transverse Transmission…