Only one powertrain was available for the '91 Caprice: Chevrolet's 5.0-liter fuel-injected V8, sending its 170 horsepower to a 4-speed automatic transmission. A 5.7-liter V8, optional in 1992-93 wagons (standard in '93 LTZ sedan), produced only 10 more horsepower than the 5.0, but 45 more pound-feet of torque--just right to haul heavy loads and tow big trailers. For 1994, a 4.3-liter V8 replaced the 5.0-liter, hooked to a new electronically controlled transmission and making 200 horsepower. At the same time, a potent new 260-horsepower version of the 5.7-liter V8 became optional--an evolution of the LT1 engine in Corvettes. That V8 was standard in the Impala SS. For its final year (1996), torque output on the LT1-based engine peaked at lower engine speed.