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AW11 (1985-1989) 
The first generation MR2 was available in naturally aspirated or supercharged form.
SW20 (1990-1998) 
The second mark; first, second and third generation MR2 was available in nonturbo or turbocharged form.
ZZW30 (1999-present) 
The third generation MR2 was only sold as a convertible.