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- HistoryGeneral
History of the AC Aceca
The 1954 debut, the Bristol-engined transformation, and the end of production in 1963.
/history
- The CarBodyGeneral
The Car — how the Aceca was built
Tojeiro tubular-steel chassis, a composite steel-tube-and-ash body frame, hand-formed aluminium panels, hatchback tailgate.
/the-car
- The CarReferenceEngineGeneral
Variants — Aceca, Aceca-Bristol, Aceca 2.6
The three engine options across the range and the numbers of each built.
/variants
- The CarEngineFuel
The AC-engined Aceca
The original AE-prefix Aceca on AC's 2.0-litre Light Six with triple SU carburettors.
/aceca-ac
- The CarEngineFuel
The Aceca-Bristol
The Bristol-engined BE-prefix Aceca — the transformation of the model.
/aceca-bristol
- The CarEngine
The Aceca 2.6
The final RS-prefix Aceca on the Ruddspeed-tuned Ford Zephyr 2.6.
/aceca-26
- The CarReferenceEngine
The AC Light Six Engine
John Weller's 1919 two-litre six: aluminium block, single overhead camshaft, in production until 1963.
/ac-engine
- The CarReferenceEngine
The Bristol Engine
The 100-series six, BMW-328-derived, that transformed the Aceca.
/bristol-engine
- HandbookReferenceFuel
Solex 32 BI Carburettors
Guide to the triple Solex 32 BI downdraught carburettors on the Aceca-Bristol.
/solex-carburettors
- HandbookFuelIgnition
Tuning the AC Aceca
Balancing triple carbs (SU, Solex, Ruddspeed) and setting Lucas ignition.
/tuning
- ReferenceRegistryGeneral
Chassis Numbers & Notable Cars
Decoding AE, BE and RS prefixes; production totals; notable individual cars.
/chassis-guide
- RegistryGeneral
Chassis Registry
Public searchable register of surviving AC Aceca chassis.
/registry
- RegistryGeneral
Registry Map
Where surviving Aceca chassis are located worldwide, by country.
/registry/map
- ReferenceGeneral
Gallery
Photographic gallery of AC Aceca and Aceca-Bristol cars.
/gallery
- GuideBuyer's GuideGeneral
Buyer's & Ownership Guide
The hub for buying, inspecting and owning an AC Aceca.
/guide
- Buyer's GuideGeneral
Buying an AC Aceca
Where to look, how to research a car, and how to complete a considered purchase.
/guide-buying
- Buyer's GuideGeneral
Auction, Dealer or Private? Buying an AC Aceca
Pros, cons, costs and legal protection for the three routes to an Aceca, with a pre-purchase checklist and FAQ.
/buying/auction-dealer-or-private
- Buyer's GuideBodyEngine
Pre-purchase Inspection
What to check on an Aceca before you commit to buy.
/guide-inspection
- Buyer's GuideGeneral
Authenticity & Provenance
Verifying that a car is what it claims to be.
/guide-authenticity
- Buyer's GuideGeneral
Documentation & Paperwork
The history file, V5, service records and other paperwork worth having.
/guide-documentation
- Buyer's GuideGeneral
Values & Market
What Acecas are worth and what drives value.
/guide-values
- GuideGeneral
Living with an Aceca
Running costs, servicing schedule, insurance, storage.
/guide-ownership
- HandbookGeneral
Handbook hub
The technical handbook: tuning, tyres & wheels, fault-finding, how-to guides.
/handbook
- HandbookGeneral
Wheels & Tyres
Original sizes, pressures, modern options, and the classic-tyre age rule.
/handbook/tyres-wheels
- HandbookFault FindingEngineCoolingIgnitionFuelElectricalBody
Fault Finding
Symptom → cause → fix reference for the AC Aceca.
/handbook/fault-finding
- HandbookGeneral
How-To & Repairs
Task-focused hands-on guides for AC Aceca owners.
/how-to
- ReferenceHistoryGeneral
Production Data
Total built and per-variant production figures in machine-readable form.
/production
- ReferenceGeneral
Frequently Asked Questions
Categorised FAQ answering every question we can support from research.
/faq
- ReferenceGeneral
Aceca vs Aston Martin DB2/4
Comparison feature.
/aceca-vs-db24
- ReferenceGeneral
Aceca vs AC Ace
How the coupé Aceca compares with the roadster Ace it was built on.
/aceca-vs-ace
- ReferenceGeneral
About the Archive
The archive, sources, and contact.
/about
- ReferenceGeneral
About the Author
Nathan Devonshire — owner-enthusiast and independent classic-car researcher.
/about-the-author
- ReferenceThe CarEngineGeneral
UBR 135 — 1958 AC Aceca-Bristol
A matching-numbers 1958 Aceca-Bristol with a documented six-decade history and a Bristol six rebuilt by Stanton Motorsport with Cosworth pistons to around 140 bhp.
/featured/ubr-135
- HistoryReferenceEngineGeneral
The Autocar Road Test, 1960 — AC Aceca-Bristol
A condensed report of The Autocar's April 1960 road test of the AC Aceca-Bristol — 115 mph, the Bristol 100D2 six, and the car's period quirks.
/archive/autocar-1960-aceca-bristol-road-test
- Buyer's GuideThe CarBodyGeneral
The Aceca Body — Aluminium, Steel & Ash
How the Aceca's aluminium body over its steel-and-ash frame is built, how it decays, where to inspect, and what a proper restoration really costs.
/guide-body
- GuideReferenceEngineFuel
Fuel, Oil & Additives: Running an Aceca on Modern Pumps
What ethanol, unleaded petrol and low-zinc modern oils do to the AC, Bristol and Ford engines — and which additives actually help.
/fuel-oil-additives
- GuideBuyer's GuideBodyGeneral
AC Aceca Interiors: Leather, Upholstery and the Facia
Caring for and restoring an Aceca interior — leather, seats, wool carpet, headlining, the facia and instruments — with a checklist and FAQ.
/guide-interior
- HandbookGuideEngineGeneral
Servicing Your AC Aceca-Bristol
A basic home-service guide for the Bristol-engined AC Aceca — intervals, tools, safety, and where each task fits in a full service.
/servicing
- HandbookGuideEngine
Changing the Engine Oil & Filter on an AC Aceca-Bristol
The right classic 20W/50, the Vokes vs spin-on filter, and the oil-cooler catch on the Bristol six.
/servicing/engine-oil-and-filter
- HandbookGuideEngineIgnition
Spark Plugs on an AC Aceca-Bristol — the 10mm Question
The Bristol engine's small 10mm spark plugs, and how owners run motorcycle plugs as a substitute.
/servicing/spark-plugs
- ReferenceGeneral
Journal
Show reports, auction viewing days and field notes — first-hand, from the road.
/journal
- HandbookFault FindingCooling
Fault: Engine overheats in slow traffic
An Aceca that runs cool on the move but climbs the temperature gauge in traffic is almost always suffering from insufficient airflow through the radiator at low speed, or a tired thermostat/water pump. The cooling system on all three engines is marginal by modern standards and unforgiving of neglect.
/handbook/fault-finding#overheating-in-traffic
- HandbookFault FindingFuel
Fault: Idle hunts or will not settle
An unsteady idle on a triple-carburettor Aceca almost always traces to unbalanced airflow between the three carburettors, an air leak past a worn throttle spindle, or a mixture that is drifting. It is a setup problem before it is an engine problem.
/handbook/fault-finding#hunting-idle
- HandbookFault FindingIgnition
Fault: Misfire under load or at higher rpm
A misfire that appears when the engine is asked to work — climbing hills, accelerating hard — is far more often ignition than fuel. Points, condenser, HT leads, plugs and distributor cap are the first suspects. All three Aceca engines run a Lucas distributor with points and condenser.
/handbook/fault-finding#misfire-under-load
- HandbookFault FindingFuel
Fault: Hard to start when hot
A warm engine that cranks and cranks before catching is usually suffering from fuel percolation in the carburettors or from ignition weakness that a cold engine tolerates. On a triple-carb Aceca the fuel path runs close to hot exhaust manifolding, and modern ethanol-blended fuel makes matters worse.
/handbook/fault-finding#hard-hot-starting
- HandbookFault FindingEngine
Fault: Persistent oil leaks
Any 60-year-old British six leaks a little oil; the question is where, and how much. Rear main seals, timing covers, rocker gaskets and sump joints are the usual sources. A dry underside is not the goal — a diagnosed and controlled leak is.
/handbook/fault-finding#oil-leaks-general
- HandbookFault FindingGeneral
Fault: Brakes pull to one side
A car that pulls under braking has an imbalance across an axle — usually one wheel cylinder or caliper piston seizing, contamination on one side's linings, or a collapsed flexible hose acting as a one-way valve. Take this seriously and stop driving until diagnosed.
/handbook/fault-finding#brakes-pulling
- HandbookFault FindingGeneral
Fault: Gearbox jumps out of gear
A gearbox that pops out of a particular gear on the overrun has worn selector detents, worn synchro hubs, or worn gear teeth. On a 60-year-old box this is a rebuild job, not an adjustment.
/handbook/fault-finding#gearbox-jumps-out
- HandbookFault FindingElectrical
Fault: Battery goes flat / ammeter shows no charge
A car of this era runs a dynamo (later cars) and a mechanical voltage regulator — a fundamentally simple charging system with a handful of usual failures. A flat battery after a run is almost always the charging system, not the battery itself.
/handbook/fault-finding#charging-low
- HandbookFault FindingBody
Fault: Blistering or white powder on aluminium body panels
White powder or blistering under paint on an Aceca panel is galvanic corrosion — the aluminium body reacting with the steel frame or fasteners through trapped moisture. Left, it eats through the panel. Caught early, it is arrestable.
/handbook/fault-finding#corrosion-alloy-body
- HandbookFault FindingGeneral
Fault: Clutch drags — grating engagement, hard to select first
A dragging clutch fails to fully release when the pedal is depressed, so gears grate on engagement. Usual causes are hydraulic (air, low fluid, failing master or slave cylinder) rather than the clutch itself — worth checking before pulling the gearbox.
/handbook/fault-finding#clutch-drag