AC Aceca and Aceca-Bristol
The AC Aceca is a hand-built aluminium two-seat coupé made by AC Cars at Thames Ditton from 1954 to 1963. It was offered with three engines: AC's own Light Six, the Bristol two-litre and, in the rare 2.6, a Ford Zephyr unit. The archive covers its history, variants, construction and surviving cars.
Last updated · First published
AC's elegant fixed-head coupé, hand-built in Surrey.
The Aceca was the closed-roof sibling of the AC Ace and a direct ancestor of the Shelby Cobra, a lightweight aluminium-bodied grand tourer, coach-built at Thames Ditton with hand-formed aluminium panels over a small steel-tube superstructure, with ash in the doors and rear hatch. About 328 examples are generally reported to have left the factory across nine years of production, each one shaped, trimmed and finished by hand.
Thinking of buying an AC at the Bangers & Cash Mathewsons auction?
Mathewsons in Thornton-le-Dale, North Yorkshire, is the family auction house featured in the TV series Bangers & Cash. An Aceca rarely comes up for sale, but hundreds of classics cross its saleroom at every auction. Our sister site thorntonledale.org reviews every car in each sale, plus guides to the show, the Mathewson family and visiting the saleroom.
The Aceca in brief.
| Maker | AC Cars |
|---|---|
| Years built | 1954 to 1963 |
| Body | Two-seat fixed-head coupé, hand-formed aluminium over a small steel-tube superstructure, with ash in the doors and rear hatch |
| Engines offered | AC 1,991 cc Light Six; Bristol 1,971 cc; Ford Zephyr 2,553 cc, Ruddspeed-tuned |
| Numbers made | 328 is the usual figure (151 AC, 169 Bristol, 8 Ford); published sources differ |
| Where built | Thames Ditton, Surrey |
| Chassis designer | John Tojeiro |
| Kerb weight | Around 895 kg |
What the AC Aceca is
The AC Aceca is a two-seat fixed-head coupé, hand-built by AC Cars at Thames Ditton in Surrey between 1954 and 1963. It was launched at the Earls Court motor show in October 1954 as the closed-roof sibling of AC Ace, using a strengthened version of that car's chassis, with the same engines and suspension layout, beneath an aluminium fastback body of its own.
Underneath is John Tojeiro's design: a ladder frame of large-diameter steel tube, with all-independent suspension by transverse leaf springs at both ends. The body uses a superstructure of small steel tubes carrying aluminium panels formed by hand, with ash frames in the doors and rear hatch and glass-fibre bulkheads. Nothing about it was pressed or jigged in quantity. Every car was shaped, trimmed and finished individually, which is why no two are quite identical and why originality is difficult to judge from photographs alone.
Three engines, one shape
The Aceca was offered with three quite different straight-sixes, and the engine is what separates the variants.
The original car used AC's own 1,991 cc Light Six, an overhead-camshaft design whose origins run back to 1919, producing around 100 hp. 151 were built. From 1956 the Aceca-Bristol used Bristol's 1,971 cc six, a descendant of the pre-war BMW 328 engine, and it is the one that made the car a genuine 120 mph continental grand tourer. 169 were built, making it both the most numerous variant and today the most sought-after. Finally, between 1961 and 1963, eight cars left the works as the Aceca 2.6, using a 2,553 cc Ford Zephyr engine reworked by Ken Rudd's Ruddspeed concern to as much as 170 bhp. It was the fastest of the three and the rarest by a wide margin.
The chassis prefix records which engine the car left the factory with: AE for the AC engine, BE for the Bristol, RS for the Ruddspeed Ford. An X, as in AEX, BEX or RSX, denotes a left-hand-drive car, according to the AC Owners' Club.
How many were built
The figure usually given is 328, and that is the total this archive uses. It should be treated with care. Published sources put it variously between 300 and 370, and no primary factory record has been produced that settles it. The production page sets out the competing figures and where each of them comes from, rather than picking one and presenting it as fact.
Two things the Aceca is often credited with
It is frequently called the first hatchback. It was the second. The Aston Martin DB2/4 of October 1953 had a lift-up rear tailgate a year earlier; the Aceca followed in October 1954.
It is also, quite correctly, called the Cobra's ancestor. The Aceca's strengthened version of the lightweight Tojeiro ladder chassis is closely related to the Ace chassis Carroll Shelby asked AC's Charles Hurlock to fit a Ford V8 into in 1961. The car that resulted, unveiled the following year, is the Aceca's direct mechanical descendant.
UBR 135, 1958 AC Aceca-Bristol
One of just 169 Bristol-engined Acecas, matching-numbers, with an unbroken six-decade history and a Bristol six rebuilt by Stanton Motorsport with Cosworth pistons to around 140 bhp.
Read the featureOne silhouette, three characters.
Aceca
The original Aceca, powered by AC's own long-serving 100 hp overhead-cam six. The purest expression of Thames Ditton engineering.
Aceca-Bristol
The connoisseur's choice. BMW-derived Bristol power transformed the Aceca into a genuine 120 mph continental grand tourer.
Aceca 2.6
The rarest of the line. A late-production experiment with Ken Rudd-tuned Ford power, foreshadowing the Cobra to come.
Quick answers about the Aceca.
More questions? Read the full FAQ. Have a correction, or a car to add? Get in touch, this archive is maintained by an owner and improved by owners.
This archive is tended regularly.
Accuracy review
Accuracy review: fault-finding engine wording and safer radiator check, buying checklist, production total qualified, registry countries normalised and disputed records marked
Home page: new heading, specification table and more questions answered
The home page now leads with the AC Aceca and Aceca-Bristol, adds an at-a-glance specification table, and answers two more common questions: what the Aceca is and when it was made. The history page now links back to it as the AC Aceca overview.
Search ownership and removal of car pricing
Made the home page the main AC Aceca reference, clarified related page titles and links, and removed car prices, valuation tables, auction amounts and repair estimates. Retired valuation pages now redirect to model or buying guidance.
Winter storage: new section on mice, rats and a stored car.
Winter storage: new section on mice, rats and a stored car.
Do you own an Aceca?
The chassis registry is an ongoing project to trace the Acecas built. 328 is the usual production figure; published sources differ. If your car, or one you know of, is not yet listed, we would be glad to hear from you.