This document provides specifications for various 90-degree V6 engines produced by General Motors between 1979-2022 including displacement, bore/stroke dimensions, horsepower, torque, compression ratio, and whether the block and heads were made of iron or aluminum. The engines range from a 3.3L V6 making 95 hp to a 4.3L V6 making 280 hp in its turbocharged variant. Over the years, improvements included increased displacement and power output while transitioning from iron to aluminum construction in later versions.

1. 90° V6
Engine Code
Years Displacemen
t
c.i.(cc)
Bore x Stroke
in mm
Power HP (kW) Torque Compression
Ratio
Block and heads
(Iron or
Alumium)
3.3L (200CID) 1979 - 1981 200 c.i. 88.9 mm × 88.4 mm 95 hp (71kW)
94 hp (70 kW)
160 lb.-ft
154 lb.-ft
8.2:1 Iron
3.8L (229 CID) 1980 - 1984 229 c.i. 94.9 mm × 88.4 mm 115 hp (86 kW
110 hp (82 kW)
175 - 190 lb.-
ft
8.6:1 Iron
4.3L (262 CID) 1985 - 2022 262 c.i. 101.6 mm × 88.4 mm 155 hp (116 kW) 230 lb.-ft 9.3:1 Iron
LB1 1985 - 1995 262 c.i. 101.6 mm × 88.4 mm 155 hp (116 kW) 230 lb.-ft 9.3:1 Iron
LB4 1985 - 1995 262 c.i. 101.6 mm × 88.4 mm 130 - 165 hp (97 - 123 kW) 210 - 235 lb.-ft 9.3:1
8.6:1
9.1:1
Iron
LU2 1990 - 1991 262 c.i. 101.6 mm × 88.4 mm 170 hp (127 kW) 225 lb.-ft 9.1:1 Iron
L35 CPI 1992 - 1995 262 c.i. 101.6 mm × 88.4 mm 200 hp (149 kW)
190 hp (142 kW)
191 hp (142 kW)
195 hp (145 kW)
260 lb.-ft @
3600 RPM
360lb.-ft @
3400 RPM
9.1:1 Iron
L35 and LF6 SCPI and MPFI 1996 - 2002 262 c.i. 101.6 mm × 88.4 mm 170 - 200 hp (127 - 149 kW) 235 - 260 lb.-ft 9.2:1 Iron
LU3 and LG3 MPFI 2003 - 2014 262 c.i. 101.6 mm × 88.4 mm 180 - 200 hp (134 - 149 kW) 245 - 260 lb.-ft 9.2:1 Iron
Turbocharged LB4 4.3L V6 1991 - 1993 262 c.i. 101.6 mm × 88.4 mm 280 hp (209 kW) 360 lb.-ft 8.35:1 Iron
LV3 2013 - 2022 262.5 c.i. 99.6 mm x 92 mm 285 hp (213 kW 305 lb⋅ft 11.0:1 Aluminum