The final variant was the D.3 "Gull Six", similar to the D.2 "Gull Four Mk III" with the revised canopy and undercarriage, but with the much more powerful 200 hp (149 kW) de Havilland Gipsy Six 6-cylinder engine. This had the same length and span as the Gull Major variants, but was 195 lb (88 kg) heavier and much faster at 178 mph (286 km/h). One Gull Six (VT-AGV) had the cabin replaced with a tandem pair of open cockpits. It was sometimes known as the P.7 "Touring Gull".Ellison 1997, p. 24.
