AMC Ambassador SST 390 V8
The AMC Ambassador SST was the flagship of American Motors Corporation's lineup — the most luxurious and powerful car from the smallest of America's significant automakers. The SST (Super Sport Trim) designation indicated the premium version with the most powerful engine option: AMC's own 390 cubic inch V8 producing 315 gross horsepower.
American Motors occupied a unique position in the American automotive industry. Too small to compete with GM, Ford, and Chrysler on volume, AMC survived by offering distinctive products that filled niches the Big Three overlooked or undercounted. The Ambassador was AMC's full-size car, designed to compete with the Chevrolet Impala, Ford Galaxie, and Plymouth Fury while offering AMC's characteristic value proposition: more standard equipment at a lower price.
The 1969-1974 Ambassador was built on the same platform that underpinned the entire AMC car line, from the compact Hornet to the mid-size Matador. This platform sharing was essential for a company of AMC's limited resources, but it also meant the Ambassador lacked the dedicated full-size architecture of its Big Three competitors.
The AMC 390 V8 was a strong engine that compared favorably with competitors. The cast-iron block and heads were durable, and the four-barrel carburetor version produced competitive power. The same engine powered AMC's muscle cars (the AMX and Javelin) and proved capable of serious performance in lighter applications.
The SST trim added a long list of standard equipment: air conditioning, power steering, power disc brakes, automatic transmission, reclining seats, and courtesy lights were all included. This represented genuine value compared to Big Three competitors where many of these features were extra-cost options.
Dick Teague's styling for the 1967-1969 Ambassador was conservative but attractive, with clean lines and a grille treatment that gave the car a presence beyond its modest dimensions. The 1970 facelift brought a more modern look, and the 1971-1974 models adopted the 'flying wedge' design that was more dramatic if less universally praised.
Today, the Ambassador SST is an affordable and overlooked collectible. AMC enthusiasts are a dedicated community, and parts support is better than many expect. The Ambassador offers a genuine full-size American car experience with the charm of underdog status and the knowledge that every mile driven celebrates American Motors' determination to compete against overwhelming odds.
AMC Ambassadors are affordable and have a dedicated parts support network through AMC-specific vendors and clubs. The 390 V8 is a robust engine but check for oil pressure issues from worn main bearings. The Borg-Warner transmission (Shift-Command) is adequate but can develop governor problems. Body rust is a major concern — check floor pans, rocker panels, trunk floor, and lower quarters. AMC-specific sheet metal parts are scarce and expensive when found. Interior components are also AMC-unique and can be difficult to source. The SST trim's standard equipment means most cars have power accessories, but motors and switches wear out. The leaf spring rear suspension can sag from age.
The Ambassador was AMC's most expensive and best-equipped car. Annual production varied from approximately 40,000-80,000 units (all Ambassador variants). The SST was the premium trim level. The 390 V8 was optional; most Ambassadors were sold with the 304 or 360 V8. The Ambassador was discontinued after 1974 as AMC consolidated its lineup around the Matador and compact models.