The RS coupe features a 2.8-liter, six-cylinder engine, while the RS convertible features a 5.0-liter, eight-cylinder engine. The 2.8-liter engine offers a 135-horsepower output while the 5.0-liter engine offers a 170-horsepower output.
Each model of RS Camaro made in 1989 offers a different torque output. The RS Camaro with the 135-horsepower engine can produce 160 foot-pounds of torque while the Camaro RS with the 170-horsepower engine offers 255 foot-pounds of torque.
A four-speed automatic transmission was an option for 1989 Camaros, but a five-speed, manual transmission was the standard. The manual transmission Camaro RS coupe offers 18 mpg economy in the city and 27 mpg economy on the highway. The manual transmission Camaro RS convertible offers 17 mpg in the city and 25 mpg on the highway.