Lotus 43

The Lotus 43 was a Formula One racing car designed by Colin Chapman and Maurice Philippe for the 1966 season, when the rules raised engine capacity to three litres. It was partly based on the Lotus 38 Indycar designed by Len Terry and was powered by the BRM P75 H16 engine, which Chapman used while waiting for the Cosworth DFV planned for 1967. The engine proved overweight, unreliable and short of its promised power, and the car won only one race, the 1966 United States Grand Prix, driven by Jim Clark with a spare engine loaned by BRM. Only two were built, and they were later sold and fitted with 4.7 litre Ford V8 engines for Formula 5000. Its chassis ideas passed on to the Lotus 49.