File:AC Cobra 427 RAM Replica, Bj. 1973 (2015-09-12 3697 b).jpg
Sports & GT · Roadster

Shelby Cobra 427

Pure American thunder in a British racing shell — everything a sports car should be, and nothing it shouldn't.

Hero: Lothar Spurzem / CC BY-SA 2.0 de · Wikimedia Commons

The Shelby Cobra 427 is the result of one of the most audacious ideas in automotive history: take the lightest, most nimble British roadster you can find, and stuff the biggest, meanest American V8 into it. The result didn't just bend the rules — it rewrote them.

Carroll Shelby was a Texas chicken farmer turned racing driver with a vision as big as the state he came from. His recipe was almost offensively simple: a featherweight AC roadster body, hand-built in Thames Ditton, England, married to Ford's thunderous 427 cubic inch big-block V8 — a 7.0-litre iron fist of an engine that had no business being in anything so delicate. The moment those two worlds collided, the Cobra 427 was born, and the automotive world hasn't quite recovered since.

Climb in — if you can call it that — and you're immediately struck by how honest the Cobra is. There is no barrier between you and the road, no padding of comfort between your right foot and catastrophe. The cockpit is narrow, the bodywork curves away on either side like a crouching animal, and the exhaust note at startup is less a sound than a physical event. You feel the torque before the car even moves. When it does move, the sensation is somewhere between exhilarating and terrifying — a raw, mechanical urgency that modern sports cars spend millions trying, and failing, to recreate.

Today, the Shelby Cobra 427 sits at the very top of the collector car world — not just as a valuable object, but as a symbol. It represents a singular moment when American ambition and British craftsmanship met on a sun-bleached racetrack and produced something that time has only made more extraordinary. The great original examples, when they surface, draw gasps from even the most seasoned enthusiasts. To drive one is a privilege. To simply stand next to one and listen to the engine tick as it cools is enough to understand why some cars transcend the category entirely.

Every last detail

Full specifications

The numbers that matter, each cited to its source. Where a figure is disputed or unconfirmed we hedge or leave it out — never guessed.

Engine

427 FE side-oiler

Displacement427 cu in (7.0 L)
ConfigurationV8
Power425 hp (gross) @ 6,000 rpm
Torque480 lb-ft @ 3,700 rpm
Bore × stroke4.23 × 3.79 in
Compression11.5:1
InductionSingle 780 cfm Holley four-barrel
Years1965-1967

A semi-competition tune was rated 485 hp. Some 427 MkIII Cobras were actually fitted with Ford's 428 FE engine.

Source: Wikipedia: AC Cobra; bore/stroke/compression per Ford FE engine (Wikipedia)
Production

How many were built

YearTrimBodyBuilt
1965-67427 Cobra (coil-spring cars)343

The 427-engined, coil-spring MkIII Cobras.

Source: shelbylegendarycars.com
Up close

Under the hood and inside

Real engine-bay and cockpit photos, shared by enthusiasts under Creative Commons.

Under the hood — Shelby Cobra 427
Under the hoodThe Ford 427 V8 in an AC/Shelby Cobra 427.Photo: BrokenSphere / CC BY-SA 3.0 · Wikimedia Commons
Inside — Shelby Cobra 427
InsideThe spartan cockpit of a Cobra 427.Photo: BrokenSphere / CC BY-SA 3.0 · Wikimedia Commons
Verify YOUR car

Is yours the real thing?

Numbers-matching engine, factory options, the day it was built — these are the people who can confirm what your car left the factory as. We point you to the marque authority; we never reproduce their records.

SAAC World Registry →The Shelby American Automobile Club registry — the authority on Shelby and AC Cobra authenticity.