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The "Spitfire 4" name indicated the possibility of the appearance of a six-cylinder version. [10] In UK specification the inline four produced 63 bhp (47 kW) at 5,750 rpm, and 67 lb⋅ft (91 N⋅m) of torque at 3,500 rpm. This gave a top speed of 92 mph (148 km/h), and a 0 to 60 mph (97 km/h) acceleration in 16.4 seconds.
A top speed of 423 mph (681 km/h) at 18,500 ft (5,639 m) was predicted. However, constant problems with the development of the Griffon meant that the decision to proceed with building a Spitfire with this engine didn't come to fruition until 1942, with the successful flight trials of the Mk IV.
The most fundamental change made to the later Merlin (60, 70, 80, and 100 series) and Griffon engines (60 and 80 series) was the incorporation of a two-stage, two-speed supercharger, which provided a considerable increase in power, especially at higher altitudes.
The new car's engine provided a 106 mph (171 km/h) top speed and 0–60 mph (0–97 km/h) in just under 12 seconds, [1] a little better than the MGB GT. Moreover, the unit was comparatively smooth and tractable, in contrast to the MG's four cylinder BMC B-series engine , which produced almost the same power in twin carburettor form, but at ...
The Beast (mk2) at Wings and Wheels in 2014.. In the 1960s, engineer Paul Jameson put a Rolls-Royce Meteor engine into a chassis he built himself. [3] He did not get around to building a body, and sold the car to Epsom-based automatic transmission specialist John Dodd, who had supplied the automatic gearbox.
The Speed Spitfire was a Supermarine Spitfire Mk I, re-engined and modified for an attempt on the world air speed record. It was already outdated when it first flew in 1938 and, despite repeated modification, never attained a competitive performance.
The early petrol-injected version TR6 could accelerate from zero to 60 mph (97 km/h) in 8.2 seconds and had a top speed of 120 mph (190 km/h) according to Autocar magazine. [8] The later CR petrol-injected engines were rated at 125bhp, while the later CF carburetted cars were rated at 106bhp.
The maximum power of the Merlin 66 was 1,720 hp (1,280 kW) at 5,750 ft (1,283 kW at 1,752 m) and the maximum speed of the Spitfire LF Mk IX was 404 mph (650 km/h) at 21,000 feet (6,400 m). [34] The Merlin 66 introduced a new Bendix-Stromberg injection carburettor, which replaced the earlier S.U float carburettor.