The 1996 model year was the first time that the Taurus did not have an optional engine.

For any of these cars, consider a bigger, optional engine.

The 262 V8 was again, the optional engine in the 49 states.

Two optional engines were available for the Cyclone.

Only the 1933 Essex-Terraplanes were made with an optional eight-cylinder engine.

The 292 six and the 327 in3 V8 were the optional engines.

The standard engine continued to be the 302 V8 with the 351 the only optional engine available, as the 400 was discontinued.

The three domestic cars, which come only with V-6's, had upgraded, optional engines.

Base models start around $15,000, but prices jump with optional engines, enlarged cabs and long lists of options.

Subsequent examples were built with many optional engine and wingspan variations.