Original Cobras

 

• 1Original Cobra Specification
  • 1.1SHELBY COBRA 427 SPECIFICATION
  • 1.2SHELBY AC COBRA 289 SPECIFICATION
  • 1.3AC MARK IV SPECIFICATION

Original Cobra Specification

SHELBY COBRA 427 SPECIFICATION

PRODUCTION LIFE 1962-1965



Body type: Two-seater roadster; all-aluminum

Chassis: Large-diameter twin-tube ladder frame with tubular suspension mountings and tubular superstructure

Engine type: Ford V8

Capacity: '427' is actually 426cu in (6,984cc) '428' is actually 427 cu in(6,991cc) (both engine types used in Cobra 427)

Bore: '427', 4.24in (107.7mm); '428', 4.l3in (104.9mm)

Stroke: '427', 3.78in (96.0mm); '428', 3.98in (101.1mm)

Compression ratio: '427', 10.4:1; '428', 10.5:1

Cylinders: Cast-iron block, five main bearings, single central camshaft

Cylinder heads: Cast-iron, two valves per cylinder, operated by pushrods

Fuel system: Single four-barrel Holley carburetor (four twin choke down draught Weber carburetors optional)

Maximum power: '427' 425 bhp @ 6,500rpm; '428' 390 bhp @ 5,200rpm

Maximum torque: '427' 480 lb ft @ 3,500rpm; '428' 475 lb ft @ 3,7OOrpm

Bhp per litre: '427' 60.8 (1.0 bhp per cu in); '428' 55.8 (0.91 bhp per cubic inch)

Gearbox type: Ford 'top-loader' four-speed manual, all synchromesh

Final drive ratio: 3:31 (numerous options available)

Clutch: Single dry-plate, hydraulic operation

Front suspension: Independent, by unequal-length upper and lower wishbones, with coil springs and telescopic dampers

Rear suspension: Independent, by unequal-length upper and lower wishbones, with additional lower trailing links, coil springs and telescopic dampers

Brakes: Solid discs front and rear

Steering: Rack and pinion (worm and sector up to chassis no CSX2125)

Wheels & tyres: 7.5J X 15in centre-lock, pin.drive, cast-magnesium Halibrand wheels (later up to 9.5J X 15 at rear); 8.5 X 15in tyres (later up to 11.4 X 15in at rear)

Overall length: 156.0in (3,962mm)

Overall width: 68.0in (1,727mm)

Overall height: 49.0in (1,244mm)

Wheelbase: 90.0in (2,286mm)

Track: Front: 56.0in (1,422mm) Rear: 56.0in (1,422mm

Ground clearance: 4.5in (114mm)

Fuel tank capacity: 15.0 gallons (18.0 US gallons) (68 litres)

Unladen weight: 2,350lb (1,066kg)

Power-to-weight ratio: 405.l bhp per ton

Performance: Maximum speed 165mph (265kph)
0-60mph (0-96.5kph) 4.2 seconds
0-100mph (0-161kph) 10.3 seconds
Standing ¼-mile 12-4 seconds
Fuel consumption 10.0mpg

SHELBY AC COBRA 289 SPECIFICATION

PRODUCTION LIFE 1962-1965



Body type: Two-seater roadster; all-aluminum

Chassis: Twin-tube ladder frame with box-section suspension mountings and tubular superstructure

Engine type: Ford V8

Capacity: 289cu in (4,736cc); the 260cu in (4,261cc) up to chassis no CSX2074

Bore: 4.0in (101.6mm); 3.80in (96.5mm)

Stroke: 2.87in (72.9mm)

Compression ratio: 11.6:1

Cylinders: Thin wall cast-iron block, five main bearings, single central camshaft

Cylinder heads: Cast-iron, two valves per cylinder, operated by pushrods Single four-barrel Holley carburetor (four twin-choke

Fuel system: Single four-barrel Holley carburetor (four twin choke down draught Weber carburetors optional)

Maximum power: 271 bhp @ 6,000rpm (260 bhp @ 5,800rpm from 260cu in)

Maximum torque: 314 lb ft @ 3,400rpm (269 lb ft @ 4,800rpm from 260cu in)

Bhp per litre: 57.2 (0.94 bhp per cubic inch); 61.0 (1.0 bhp per cubic inch for 260cu in 4,261cc)

Gearbox type: Borg-Warner four-speed manual, all synchromesh Gear ratios. Fourth: 1:00 - Second: 1.78 - Third: 1:41 -First:2:36 Reverse: 2:36

Final drive ratio: 3:77 (numerous options available)

Clutch: Single dry plate, hydraulic operation

Front suspension: Independent. by lower wishbones and transverse leaf spring upper link, telescopic dampers

Rear suspension: Independent by lower wishbones and transverse leaf spring upper link, telescopic dampers

Brakes: Solid discs front and rear

Steering: Rack and pinion (worm and sector up to chassis no CSX2125)

Wheels & tyres: 6J x 15in (15.2 X 381mm) centre-lock wire wheels; 7.35 x 15 cross ply or 185 x 15in radial tyres

Overall length: 151.5in (3,848mm)

Overall width: 61.0in (1,549mm)

Overall height: 49.0in (1,244mm)

Wheelbase: 90.0in (2,286mm)

Track: Front: 51.Sin (1,308mm) Rear: 52.5in (1,333mm)

Ground clearance: 5.0in (127mm)

Fuel tank capacity: 15.0 gallons (18.0 US gallons) (68 litres)

Unladen weight: 2,170 lb(984kg)

Power-to-weight ratio: 279.7 bhp per ton

Performance: Maximum speed 138mph (222kph)
0-60mph (0-96.5kph) 5.5 seconds
0-100mph (0-161kph) 13.0 seconds
Standing ¼-mile 13-9 seconds
Fuel consumption 15.1 mpg

AC MARK IV SPECIFICATION

General: Stainless steel bumpers mounted on hydraulic rams to absorb low speed impacts.
Driver's side rollover bar.
Traditionally hand crafted interior using finest English leather and deep pile wool carpeting.

Body type: Two-seater roadster,Hand rolled 16 gauge aluminium alloy body

Chassis: space frame 'ladder' construction chassis.

Engine type: Ford V8

Capacity: 4942 cc (302 cu in)

Bore: 101.6 mm (4.0 in)

Stroke: 76.2 mm (3.0 in)

Compression ratio: 9.0:1

Values: OHV

Aspiration: Electronic fuel injection

Maximum power: 225 bhp @ 4200 rpm

Maximum torque: 300 lb ft @ 3200 rpm

Bhp per litre: 57.2 (0.94 bhp per cubic inch); 61.0 (1.0 bhp per cubic inch for 260cu in 4,261cc)

Gearbox type: Borg Warner T5OD 5 speed manual, all synchromesh Gear
1st 3.35, 2nd 1.93, 3rd 1.29, 4th 1.00, 5th 0.68, Reverse 3.15

Final drive ratio: Salisbury limited slip differential, rear wheel drive 3.31:1

Clutch: Single dry plate, hydraulic operation

Suspension: Unequal length wishbones, coil springs and twin tube dampers

Brakes: Dual circuit servo assisted discs all round, ventilated at front

Steering: Rack and pinion Turns lock to lock 3.6 Turning circle 10.9 m (35 ft lOin) kerb to kerb

Wheels & tyres: Front 7 x 16 in Rear 8 x 16 in Spare7x 16in Tyres Front 225/SOVR x 16 Rear 255/5OVR x 16 Spare 225/SOVR x 16

Overall length: 4200 mm (165.4 in)

Overall width: 1746 mm (68.7 in)

Overall height: 1200 mm (47.2 in)

Wheelbase: 90.0in (2,286mm)

Track: Front track 1409 mm (55.5 in) Rear track 1485 (58.5 in)

Wheelbase: wheelbase 2285 mm (90 in)

Fuel tank capacity: Fuel tank capacity 70.5 ltr (15.5 imp gals)

Unladen weight: Kerb weight 1120kg (2469.6 ib) Weight distribution 50:50

Power-to-weight ratio: 200 bhp per ton

Fuel Consumption: City 15.7 ltr/100km (18mpg)
Country 10.9 ltr/100km (26 mpg)

Cabin dimensions : Headroom 910 mm (36.0 in) Legroom 1100/925 mm (43.0/36.5 in) Shoulder room 1257 mm (49.5 in) Luggage capacity 0.27 cu cm (9.50 a' ft)

Performance: 060 mph 5.3 seconds
0-100mph 13.3 seconds
Top speed 135 mph

Dashboard: Speedometer, tachometer, oil pressure gauge, oil temperature gauge, water temperature gauge, fuel gauge, voltmeter, hand brake/brake fluid level warning light, main beam warning light, indicator warning light, low fuel warning light, oil pressure warning light and ignition warning light.

Standard Equipment: Hood and tonneau, driver's side roll-over bar, dual catalyst exhaust system, leather interior, fully carpeted boot and alloy wheels. Alarm system, mohair hood/tonneau, painted stripes, painted wheel centres, three eared spinners (set of four), stainless steel side vents, oil cooler, Nardi wood rim steering wheel, wooden gear knob, windwings, perspex sun visors, rubber mats, radio cassette including two speakers, CD multichanger radio cassette including 4 speakers and electric aerial.