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 AC 428 photo

1971 AC 428

In the mid-1960s, AC Cars began transforming its Cobra sports car into a luxury Grand Tourer, displaying a two-seater convertible at the 1965 Earls Court Motor Show and a fastback-styled Coupe at the Geneva Salon a year later. Production of the AC 428 Frua lasted from 1967 to 1973 with just 81 examples built, comprised of 30 convertibles and 51 fastbacks.

The Cobra MKIII coil-sprung, fully independent suspension was extended by 6-inches in the wheels and clothed with elegant steel coachwork by Pietro Frua, with a similar design to Maserati's Mistral. The boot lid and bonnets were fabricated from lightweight aluminum. The chassis were built at the AC plant in England then shipped to Italy where Frua fitted the body before sending them back to England to have the powertrain and trim added. The chassis was rather conventional with rectangular and square tubing connecting the steel body to the frame. Its wheelbase measured 95 inches, its length of 176 inches, and a width of 68-inches.

The model was named in reference to its 428 cubic-inch (7-liter) Ford Galaxie FE engine which produced less power than the Cobra 427's. Nonetheless, with 345 horsepower on tap and an overall weight of 1,416 kg, the AC 428 was capable of sub-six-second 0-60mph times and 0-100mph times of around 14.5 seconds, with a maximum speed in excess of 140mph. The majority of the cars were equipped with automatic transmissions, which complemented the grand touring persona.

The 428 cubic-inch V8 engine produced 345 horsepower at 4,600 RPM and 475 lb-ft of torque at 2,800 RPM. It had 10.5:1 compression, hydraulic valve lifters, and either Autolite or Holley four-barrel carburetors. Some examples received the higher performance cross-bolted main Ford 427 engine which produced 385 horsepower at 5,600 RPM and 460 lb/ft of torque. Transmission options included a fully synchronized four-speed close-ratio Ford Toploader unit or a three-speed Ford C6 automatic. Steering was by a Rack & Pinion and the differential was a Salisbury unit with a 2.88 drive ratio for automatics and 3.08 for manuls. Four-wheel power-assisted disc brakes provided the stopping, with Girling 3-pistons, and dual remote servo assistance. A fully adjustable independent suspension setup with double triangular wishbones, coil springs, and hydraulic telescopic shock absorbers was located at the front and rear.

The AC 428 Frua was stylish, elegant, and luxurious with performance that rivaled the supercar elite of the day. Its Achilles Heel was the steep price which was roughly twice that of a Jaguar E-Type and more than an Aston martin DB6.


by Daniel Vaughan | Oct 2021

Related Reading : AC 428 History

AC Cars built the AC 428 (also known as the AC Frua) was produced from 1965 through 1973 with 81 examples produced. 49 were fastback coupes, 29 were convertibles, and three were given special bodies. The cars were built on an AC Cobra 427 Mark III chassis that was extended by 6 inches. The chassiss were built by AC Cars and then sent to Italy where they received their coachwork by Frua. After that....
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Related Reading : AC 428 History

An extremely limited edition model, the AC Frua was designed by Pietro Frua, rather than Caroll Shelby, like most AC cars. The Frua name was chosen accordingly and featured a huge seven-liter big-block V8 from the current Ford Mustang. A British GT car of the 1960s and early 1970s, the Classic AC Frua was also known as the AC 428. Only eighty-one models were ever built from 1965 through 1973,....
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1971 Vehicle Profiles

1971 AC 428 vehicle information

Fastback Coupe
Designer: Frua

Chassis Num: CF60
Engine Num: 1092K11KR

This 1971 AC 428 Fastback is powered by an overhead-valve Ford V8 engine fitted with a four-barrel carburetor and delivering 345 horsepower at 3,400 RPM. There is a four-speed C6 automatic transmission (one of approximately 62 of the 80 cars equipped....[continue reading]

Fastback Coupe
Chassis #: CF60 

Recent Vehicle Additions

Performance and Specification Comparison

428

Year
Production
Wheelbase
Engine
Prices
96.00 in.
8 cyl., 428.02 CID., 345.00hp
96.00 in.
8 cyl., 428.00 CID., 345.00hp
96.00 in.
8 cyl., 428.02 CID., 345.00hp
96.00 in.
8 cyl., 428.00 CID., 345.00hp

Industry Production

#1#2#3AC
1976Chevrolet (2,103,862)Toyota (1,884,260)Ford (1,861,537)
1975Chevrolet (1,755,773)Toyota (1,714,836)Ford (1,569,608)
1974Chevrolet (2,333,839)Ford (2,179,791)Renault (1,355,799)
1973Chevrolet (2,579,509)Ford (2,349,815)Fiat (1,390,251)
1972Chevrolet (2,420,564)Ford (2,246,563)Fiat (1,390,251)
1971Ford (2,054,351)Chevrolet (1,830,319)Volkswagen (1,128,784)
1970Ford (2,096,184)Chevrolet (1,451,305)Volkswagen (1,193,853)
1969Chevrolet (2,092,947)Ford (1,826,777)Volkswagen (1,241,580)
1968Chevrolet (2,139,290)Ford (1,753,334)Volkswagen (1,191,854)
1967Chevrolet (2,206,639)Ford (1,730,224)Toyota (1,068,321)
1966Ford (2,212,415)Chevrolet (2,206,639)Volkswagen (1,168,146)

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