Roadmaster wagons started off with a single engine: a Chevrolet-built 5.0-liter V8 with single-point fuel injection, making 170 horsepower, connected to a 4-speed overdrive automatic transmission. A 5.7-liter V8 arrived along with the sedan, rated at 180 horsepower and yielding considerably more torque than the 5.0-liter. The Corvette-based LT1 engine installed in 1994 Roadmasters made 260 horsepower and 335 pound-feet of torque. Although the block was the same as that used under prior Roadmaster hoods, most internal parts were new. The LT1 engine had one fuel injector for each cylinder, plus a stainless-steel dual exhaust system. A new electronic 4-speed automatic also entered Roadmasters for '94.