The Austin-Healey 100 was a sports car produced from 1953 to 1956 in England. It was based on the Austin A90 Atlantic mechanics. It was named after its ability to reach speeds of 100 mph (160 km/h). It was replaced by the Austin-Healey 3000. A total of 14634 examples were produced. The Healey 100 was the first of three models that were later called Big Healey’s. It was produced in two series.

It was powered by a 2.7-litre I4 engine, which was mated to a 3-speed (first series) or 4-speed (second series) manual gearbox. The first series had a power output of 90 hp (67 kW), an average fuel consumption of 12.6 l/100km and could accelerate from 0 to 100 km/h (62 mph) in about 11.5 seconds. A high-performance version (100M), which had an output of 110 hp (82 kW), and a racing version (100S) with 132 hp (98 kW) were also sold.