Whats the difference between 1994 2.3 dual spark plug and 1988 2.3?

* Introduced in 1994

* 2.3-liter inline-four engine

* Dual spark plugs per cylinder

* 155 horsepower at 5,800 RPM

* 160 lb-ft of torque at 4,900 RPM

* Improved fuel economy and emissions compared to the 1988 2.3

1988 2.3

* Introduced in 1988

* 2.3-liter inline-four engine

* Single spark plug per cylinder

* 140 horsepower at 5,200 RPM

* 155 lb-ft of torque at 3,800 RPM

* Less fuel efficient and produced higher emissions compared to the 1994 2.3