The HSC was an automobile engine from Ford Motor Company sold from 1984 until 1994. It was produced in Lima, Ohio, largely using tooling and designs adapted from the predecessor 200 cid straight-6.

2.3

The 2.3 L (2311 cc) version was introduced in 1984 for the Ford Tempo/Mercury Topaz. Bore is 3.7 in (93.5 mm) and stroke is 3.3 in (83.8 mm). Two versions were produced: One produced 98 hp and 124 ft.lbf, and another produced 100 hp and 130 ft.lbf (also known as HSO for High Specific Output). Both were introduced as carbureted engines and were gradually upgraded, first to Central Fuel Injection (CFI) and later to MPFI.

Sequential fuel injection was added for 1992.

Applications:

• 1984-1994 Ford Tempo
• 1984-1994 Mercury Topaz

2.5

A 2.5 L version appeared in 1986 with longer 90.9mm stroke and electronic fuel injection. The extra displacement was needed to provide a four cylinder engine option for fleet customers of the new Ford Taurus. It sold in low volume (less than 15% of the HSC engines built).