How Is A Firebird Formula Different From A Trans Am? True to its name, the 1970 Formula 400 came standard with a 400 cubic-inch, 330-horsepower V8, while the optional 345-horsepower Ram Air III V8 ...

As before, the Trans Am's standard engine was optional in the Formula. The third-gen Firebird redesign (1982-92) brought lighter weight, smaller size, and improved aerodynamics to boost the car's ...

The first-gen Firebird and Trans Am were also available as convertibles. However, the convertible option went away with the second-gen release and wouldn't make a comeback for decades.