Four Stroke Petrol Engine (1982)(B. Horsfield) ROM Download for Sinclair ZX81 (). Four Stroke Petrol Engine (1982)(B. Horsfield) game is available to play online and download only on Roms Games. Four Stroke Petrol Engine (1982)(B. Horsfield) ROM for Sinclair ZX81 download requires an emulator to play the game offline. This Game is English (USA) Version and is the highest quality available.