Mazda's system was electronic and more complex than the 4WS system introduced by Honda on the 1988 Prelude; these two marked the first 4WS systems for the American market.
Mazda's new 4-cylinder is a much-improved 2.3 L 4 with 160 hp (119 kW); the V6 was taken from Ford's Taurus.
Mazda was the last of the Japanese to increase its entry to "midsize" status; the 6 is still the smallest (and most agile) of the bunch.