260
not any 2010 Buick Roadmasters,the last year any were built was 1996.
The 1993 Buick Roadmaster wagon is equipped with a 5.7-liter V8 engine that produces approximately 230 horsepower. This engine is part of the General Motors LT1 family and provides a blend of performance and comfort typical of full-size American station wagons from that era. The Roadmaster wagon is known for its spacious interior and classic styling.
350
160hp
The 1996 Ford Mustang GT was rated at 215 horsepower
I believe it is 260 horsepower.
1970s 155hp
The V6 3.1L has 140HP
It has 197 horsepower. The engine is 6L.
123bhp
170
It holds 21 gallons. Got this from the owner's manual