Table:
text: Rupert Keegan
Complete Formula One World Championship results
Complete Formula One World Championship results
Year_ Entrant Chassis Engine Pts_
1977 Penthouse Rizla Racing Hesketh 308E Ford V8 0
1978 Team Surtees Surtees TS19 Ford V8 0
1978 Team Surtees Surtees TS20 Ford V8 0
1980 RAM Penthouse Rizla Racing Williams FW07 Ford V8 0
1982 Rothmans March Grand Prix Team March 821 Ford V8 0

Question: Which engine was used by Ram Penthouse Rizla Racing under Rupert Keegan in 1978?