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Answered 2006-09-11 23:28:54

The 1988 Prelude Si has the optional B20A5 DOHC EFI engine. The standard B20A3 2.0 L SOHC carburated engine was not used in the Si. So you can tell by the fuel system, which engine you have. The standard engine had Carbs and the Si engine had FI. B20A3 (12-valve, SOHC, dual side-draft carburetors) Found in: 1988-1991 Honda Prelude 2.0 S HorsePower: 104 @ 5800 (MT) 105 @ 5800 (AT) Torque: 111 @ 4000 B20A5 (16-valve, DOHC, PGM-Fuel Injected) Found in: 1988-1991 Honda Prelude 2.0Si Power: 135 hp

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