Ford UK's Zephyr/Consul cars used a new family of engines. The Zephyr engine included both straight-4 and straight-6 OHV engines. Production began in 1951 and lasted through to 1966, when it was replaced by Ford's Essex V4 and Essex V6 engines. Consul/Zephyr 4 The straight-4 engine started in 1951 at . In this form it had a bore and stroke of . With its standard compression ratio of 6.8:1 it produced an output of at 4400 rpm. It was enlarged in 1956 to engine for the Mark II Consul by increasing both the bore and stroke to , putting the power up to . This engine continued in the Mark III car, now called Zephyr. Automobiles using the Consul engine: Allard Palm Beach Buckler DD2 Ford Consul Ford Zephyr 4 Paramount Ten Reliant Sabre Zephyr 6 The straight-6 Zephyr engine was used widely. Displacement began at when it shared the same bore and stroke as the 4-cylinder engine. It was produced with two standard compression ratios of 6.8:1 and 7.5:1 with outputs of . It grew to in the 1956 Mark II. AC Ace AC Greyhound Allard Palm Beach Britannia GT Fairthorpe Zeta Ford Zephyr Ford Zodiac Lea-Francis Lynx Reliant Sabre Reliant Scimitar See also List of Ford engines Zephyr Straight-four engines Straight-six engines Gasoline engines by model