Porsche 944 For Sale

25 Jan 2015 | Author: | Comments Off on Porsche 944 For Sale
Porsche 944

Porsche 944

specifications

Porsche 944 Automatic 2-seat. rear wheel drive coupe with 2 doors. It made it’s debut in 1982.

The engine in the Porsche 944 Automatic is a naturally-aspirated engine with 4 cylinders with 2 valves per cylinder, engine displacement of 2479 cc and single overhead camshaft (SOHC).

It has a longitudinal alignment and is set in the front of the vehicle. Its cylinders are arranged inline.

The compression ratio is 10.60:1.

The engine generates maximum power of 120 kW / 163 HP at 5800 rpm and maximum torque of 205 Nm at 3000 rpm.

The fuel system of this model is injection.

The oiling system used for lubricating the engine’s parts is wet sump.

The vehicle can accelerate for 9.60 s from 0 to 100 km/h.

With a drag coefficient of 0.35 which is very good, the frontal area is 1.8200 m2 and the drag area is 0.6370 m2.

Porsche 944 Automatic has a 3-speed automatic transmission (as used in the Mercedes salloon) 1.00:1 is the top gear ratio. Its final drive ratio is 3.08:1.

Fuel consumption is outstanding for a vehicle with this performance – combined fuel consumption of 11.2 l/100 km, urban of 7.9 l/100 km and extra urban fuel consumption of 9.4 l/100 km.

The fuel tank’s volume is 66.0 l.

Steering box of the vehicle is rack and pinion type. The number of lock-to-lock wheel turns is 4.

Rear suspension includes independent, semi-trailing arm, torsion bar and the front suspension – anti-roll bar, coil springs, independent, MacPherson strut, wishbone.

Porsche 944 Developement History

Unfortunately, it’s somewhat of a simplification to say that the 944 engine is just half of a 928 power unit.

Things are never that simple and, along the way, much changed -to the point where few parts are interchangeable, but the design concept remains very much the same.

The result of the drive to produce a more Porsche-like Porsche was an in-line, four-cylinder, all-aluminium engine-with a belt-driven single overhead camshaft, two valves per combustion chamber and a more healthy (than the 924) 163bhp, developed with the aid of the latest Bosch fuel injection system.

At the time, as one of the largest four-cylinder engines in volume production, with pistons of 100 mm diameter (the biggest seen to that date in a Porsche) and a stroke of only 78.8mm, the original 2.5-litre 944 motor was very decidedly over-square.

Big pistons mean good torque, but they can also mean a harsh engine, limited on rpm.

Porsche 944

To solve this problem, designer Gerhard Kirchdorffer went back in time. 3efore the First World War, British engineer Frederick Lanchester devised a balance system to smooth out the vibrations four-cylinder units, which was used in Daimler, Vauxhall, and Willys cars, as well as those that carried his name.

Ford used the concept in the 1960s with its V4 engine, and Mitsubishi further developed it.

Reluctant to pay the Japanese company royalties, initially, Porsche went its own way, but eventually had to settle for a very similar system.

But it worked and the 2.5 litre 944 engine proved to be the start of a highly successful family that’s proved a winner on both road and track.

Although it’s not actually one half of a 928 VB engine, the 944 four-cylinder mirrors many of the design concepts introduced on the big-engine car, particularly in respect of the basic layout and the use of aluminium.

And, like the 928, but unlike all other Porsche-manufactured engines of the time, it was water-cooled.

Remove the cylinder head from a 944 and you’re immediately struck by the construction of the block.

Cast from aluminium and silicon alloy (AiuSil), developed by Reynolds Aluminium and first used on the Chevrolet Vega of 1971, it’s of ‘open deck’ configuration which means there’s no face on the top of the block, and the cylinder bores are exposed.

Those cylinders are an integral part of the casting and, unlike many alloy block engines, have no liners, the aluminium pistons being treated with an iron coating to reduce friction, particularly at the running-in stage. At 100 mm diameter, at the time they were introduced the pistons were the largest used by Porsche and, with a stroke of 78.8mm, the capacity is 2479cc.

An increase in piston size to 1 04mm for the final year of 944 production resulted in a capacity of 2681 cc.

Unlike many engines, where it extends well below the crankshaft to add rigidity, the block is short in height, ending at the centre line of the crank. Instead, there is a separate ladder structure -again aluminium -which bolts to the base of the block and contains the bottom caps for each of the five crankshaft mains bearings.

The crank bearing housings are machined with the ladder in place. The crankshaft itself is manufactured from forged steel, with 69.7mm diameter mains bearings and 51.9mm big-end journals. The aluminium pistons -with cut-outs for valve-head clearance and a dimple for the spark plug -were designed

Porsche 944
Porsche 944
Porsche 944
Porsche 944
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