There are 22 main models, with many variations. For instance, the Mk IX was fitted with about 3 different engines, also many of the later models could have a 4 or 5 blade propeller.
There were many models of the Spitfire, with different engines and wings. Early models were around 4,900 pounds empty, and by 1944 most were around 6,600 pounds.
There were at least 22 main models of the Spitfire and these had some variations. Including all variations (different engines, propellers, guns etc,) I would say there were in excess of 50 different models
The fastest models of Spitfire could do over 440 mph.
Reginald Mitchell designed the Spitfire. All further models were modifications of his design
Spitfire's stalling speed was about 80-90 mph on most models .
Many Spitfire PR XIX models had the upgraded Mk VII wing and an extra fuselage tank. These aircraft had a range of 900-1,000 miles.
There were many variants of the Spitfire with different wings, fuselages, engines and propellers. Wing spans went from 32 ft for the Mk V up to 40 ft for the high altitude models. The most common wing on many models was 36 ft 10 in.
Early Spitfires had 8 machine guns. Later models had 4 20mm cannon.
In production the different models came with 3, 4 or 5 blade propellers of different manufacturers.
There were many marks and variations of Spitfire, so that is not an easy answer. Most early marks carried 85 Imp gallons in 2 tanks in fuselage. Later models had 2 wing tanks of 18 gall each and other later models had another fuselage tank with 33 gal more. Most late model Spitfire had a total of 164 gallon capacity.
Early Spitfires had 8 x 303 machine guns. Later models had 4 x 20mm cannon.
There were about 26 models of the Spitfire, most with different Rolls Royce Merlin engines. Early models were 1,030 hp and the final version, 5 years later had a 2,025 hp improvement of the Merlin called Griffon.