1958 Ariel 4G Square Four Mark II. Picture credits - Sohclassicas.blogspot.no.
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| General information |
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| Model: | Ariel 4G Square Four Mark II |
| Year: | 1958 |
| Category: | Allround |
| Rating: | Do you know this bike?
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| Engine and transmission |
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| Displacement: | 995.0 ccm (60.71 cubic inches) |
| Engine type: | Square four cylinder |
| Engine details: | Double twin cylinder arranged as a square. |
| Power: | 45.0 HP (32.8 kW)) @ 5500 RPM |
| Top speed: | 160.0 km/h (99.4 mph) |
| Compression: | 6.0:1 |
| Bore x stroke: | 65.0 x 78.0 mm (2.6 x 3.1 inches) |
| Valves per cylinder: | 2 |
| Fuel system: | Carburettor. SU MC2 carburettor with air cleaner |
| Fuel control: | Overhead Valves (OHV) |
| Lubrication system: | Dry sump with dual oil pump. |
| Cooling system: | Air |
| Gearbox: | 4-speed |
Transmission type,
final drive: | Chain |
| Clutch: | Dry, 3-plate |
| Fuel consumption: | 3.04 litres/100 km (32.9 km/l or 77.38 mpg) |
| Greenhouse gases: | 70.5 CO2 g/km. (CO2 - Carbon dioxide emission) |
| Chassis, suspension, brakes and wheels |
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| Frame type: | Full cradle |
| Front suspension: | Oil damped telescopic fork |
| Rear suspension: | Plunger-link spring |
| Front tyre: | 3.25-19 |
| Rear tyre: | 4.00-18 |
| Front brakes: | Expanding brake (drum brake) |
| Diameter: | 178 mm (7.0 inches) |
| Rear brakes: | Expanding brake (drum brake) |
| Diameter: | 203 mm (8.0 inches) |
| Wheels: | Wire spoked. Dunlop tyres. |
| Physical measures and capacities |
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| Weight incl. oil, gas, etc: | 197.3 kg (435.0 pounds) |
| Overall length: | 2184 mm (86.0 inches) |
| Overall width: | 686 mm (27.0 inches) |
| Ground clearance: | 140 mm (5.5 inches) |
| Wheelbase: | 1422 mm (56.0 inches) |
| Fuel capacity: | 18.93 litres (5.00 gallons) |
| Oil capacity: | 3.40 litres (0.22 quarts) |
| Other specifications |
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| Color options: | Deep red |
| Starter: | Kick |
| Light: | 7.5 inch, 30 Watt headlamp. |
| Comments: | Also called ´Squariel´. Designed by Edward Turner. Mark II has separate barrels, a re-designed cylinder head with four separate exhaust pipes from two cast-aluminium manifolds and a rocker-box combined with the inlet manifold. Sidecar option. |
| Further information |
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| Ask questions | Join the 58 Ariel 4G Square Four Mark II discussion group or the general Ariel discussion group. |
| Related bikes | List related bikes for comparison of specs. |
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