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AC Cobra 260/289
This online guide for the AC Cobra 260/289 is designed
to be of interest to car enthusiasts and
contains facts, history, information,
statistics, specs, specifications, design
details and ratings. A free, online
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AC Cobra 260/289 made by the famous motor
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AC Cobra 260/289 Car Facts, Description, Design & General Information
1961: Bristol had decided to cease
production of their own engine and use a Chrysler
331 cid V8 instead. AC began using a 2.6 litre
Ford Zephyr engine in their cars. September,
Shelby airmailed AC a letter that asked if
they would build him a car to hold a V8
engine. AC agreed as long as a suitable engine
was found. Carroll Shelby first went to
Chevrolet to see if they would provide an
engine, but Chevrolet not wanting to add
competition to the corvette, said no. Ford wanted
to compete with the Corvette and happened to
have a brand new small block, thin walled engine
that could be used in the endeavour.
1962: January: A 221ci Ford V8 was fitted in to
AC's prototype chassis CSX0001 in Thames Ditton,
Surrey.
1962: February: Following testing and
modifications, the engine and transmission were
removed, the chassis was then air freighted to
Shelby in Los Angeles were his team fitted an
engine and transmission in less than 8 hours and
began road testing. Production was easy as AC
had made most of the modifications needed for
the small block V8 including extensive reworking
of the AC Ace's front end. One of the more
important modifications was the fitting of a
much stronger rear differential to handle the
increased engine power. Instead of an old ENV
unit, a Salisbury 4HU unit with inboard disk
brakes was chosen. However, on the production
version, the inboard brakes were moved outboard
to reduce cost.
Cobra Mark I's were fitted with 4.2litre engines
of which 75 were made, then 51 Mark I's models
were produced with a larger version of the
Windsor Ford engine V8, a 4.7 litre version.
1962: Late in the year: AC's chief engineer,
Alan Turner finished a major design change of
the car's front end, he was now able to fit rack
and pinion steering while using transverse leaf
spring suspension.
1963: The Mark II entered production. A steering
rack was borrowed from an MGB with a steering
column from a VW beetle. Around 528 Mark II
Cobras were built.
1964: October: Two prototype Mark III were sent
to the United States, after, unpainted rolling
chassis were sent for Shelby's workshop to
finish.
An AC Cobra Coupe was estimated to have done
185mph on the M1 motorway in England, driven by
Jack Sears and Peter Bolton, this was done
during a shakedown test prior to that year's Le
Mans 24hour race. This resulted in government
officials citing the increasing accident death
rate in the early 1960's as principal motivation
along with the AC highlighting the risk and
implemented national speed limits.
1965: January: Production of the AC Cobra Mark
III began. This new car had been designed in
cooperation with Ford in Detroit. They built a
new chassis using 4 inch tubes for the main
chassis rather than 3 inch and had coil spring
suspension all round. The car also had a larger
radiator opening and wide fenders. The Mark III
was also powered by a side oilier Ford 427 engine
that had been rated as 425bhp, providing a top
speed of 163mph in the standard model, with a
485bhp engine in the competition model a
top speed of 180mph was achieved.
1965: AC Cobra Mark II production ceased in
the summer. During 1965 300 Mark
III Cobras were sent to Shelby in the USA, even though
it was an impressive automobile, the car was a
financial failure and did not sell well. The
cars ended up with Ford's 428, 7litre engine
with a long stroke, smaller bore and a lower
build cost.
1967: Ford and Carroll Shelby discontinued
importing AC cars from England, although
still successful in racing AC Cobra's were a
financial failure. AC Cars continued producing
coil spring AC Roadster's with the small block
Ford 289 with narrow fenders, this was
built and sold in Europe until late 1969.
AC Cobra 289 Measurements
The measurements of the AC Cobra 289 are as follows:
AC Cobra 289 Specifications
The specifications (specs) are:
-
Bore x
stroke: 101.60mm x 72.90mm
-
Cylinders: 8 cylinders in a "V" at 90°
-
Displacement: 4.7litre or 4727cc
-
Car Type:
2 seater Drop head coupe
-
Number
of doors: 2
-
Engine
type: Overhead valves, 2 valves per cylinder, 16 valves in
total
-
Construction:
-
Sump:
-
Compression ratio: 11.00:1
-
Fuel
system: 1 Ho carb
-
Maximum power: 271bhp
-
Specific output: 57.3 bhp/litre
-
Maximum torque: 423.0 Nm
-
bmep:
1124.5 kPa
-
Specific torque: 89.49 Nm/litre
-
Maximum rpm:
-
Manufacturer: Ford
-
Code:
-
Main
Bearings: 5
-
Coolant: water
-
Bore/stroke ratio: 1.39
-
Unitary capacity: 590.88cc/cylinder
-
Aspiration: Normal
-
Compressor type: N/A
-
Intercooler: None
-
Catalytic converter: N
AC Cobra 289
Performance
Facts about the performance of the AC Cobra 260/289 are as follows:
AC Cobra 289 Features and Body Styles
Facts about the features and body styles of the AC Cobra 260/289 are as follows:
-
Engine
location: Front
-
Engine
alignment: Longitudianl
-
Drive:
Rear wheel drive
-
Steering:
rack and pinino
-
Turns
lock to lock: 2.900
-
Turning
circle: 10.50 m
-
Suspension Front: Independent, coil spring,
wishbone
-
Rear: Independent, coil spring, wishbone
-
Wheels
Front: 6½L x 15
-
Rear: 6½L x 15
-
Tyres
Front: Dunlop SP41 HR 185- 15
-
Rear: Dunlop SP41 HR 185- 15
-
Brakes
Front: Discs
-
Rear: Discs
-
Transmission(s): 4 gear manual
-
Power Steering:
No
-
Security
System: No
-
Immobilizer Theft-Deterrent System: No
-
Alloy
Wheels: No
-
Remote
Trunk Release with Lock: No
-
Fuel Injection:
N
-
Tires (Tyres):
Dunlop
-
Designer:
AC Cobra 260/289 Internal Features
The facts about the internal features of the AC Cobra 260/289 are as follows:
-
Air
Conditioning: No
-
Trim Description:
-
Central Locking: No
-
CD and tape audio storage: No
-
Electric Windows: No
-
Sunroof: No
-
Lockable Glove Compartment with Light: No
-
Map Lights: No
-
Seating Features:
-
Flat-folding rear seats: No
-
Airbags: No
-
Power Mirrors: No
-
Rear Window Defroster: No
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