Lancia Gamma / 20 HP (1910)
|Engine||3,460 cc Tipo 55 I4 (petrol)|
|Wheelbase||2,740, 2,932 mm (107.9, 115.4 in)|
|Width||1,615 mm (63.6 in)|
|Kerb weight||820–850 kg (1,808–1,874 lb) (chassis)|
- Engine : Type 55 ; front engine, longitudinal, 4-cylinder in line , monoblock (cast iron), bore 100 mm, stroke 110 mm, total displacement cm³ 3455.75, head fixing cylinders, solid alloy d ' aluminum , distribution to parallel side valves (2 valves per cylinder) controlled by alateral camshaft (in the crankcase) driven by gears ; crankshaft on three supports; compression ratio 5: 1, maximum power 40 CV at 1,500 rpm; drop feed ( carburetorvertical 2 nozzle lance); high-voltage magnet ignition ( Bosch ) with manually adjustable advance value; forced lubrication, with pump; capacity of the lubrication circuit 7 liters; water cooling with honeycomb radiator.
- Transmission : shaft with cardan joints , traction on the rear wheels; multi- plate clutch in oil bath; 4-speed gearbox ( light alloy box) plus reverse with side lever control; gear ratios: 3.891: 1 in first, 2.381: 1 in second, 1.618: 1 in third, direct drive (1: 1) in fourth, 3.268: 1 in reverse; final reduction ratio (bevel gears) 3,267: 1 (15/49) or 3,0625: 1 (16/49)
- Suspensions : front with rigid axle and semi-elliptical longitudinal leaf springs, rear with rigid axle with longitudinal leaf springs with 3/4 ellipse (semi-elliptical leaf springs in combination with the short wheelbase frame)
- Brakes : foot brake (mechanical) acting on the transmission and hand brake (mechanical) acting on the rear wheels
- Wheels and tires : wooden spoked wheels (on request: RAF spoked wheels) 820 x 120 or 815 x 105 tires
- Steering : right-hand drive position; column inclination available in two different configurations (38º or 47º); steering screw and wheel.
- Frame : steel, with side members and cross members; wheelbase 293.2 cm (available also frames with 274 cm or 322.7 cm wheelbase), front track 133 cm rear track 133 cm; variable frame length according to wheelbase (399.6 cm with 293.2 cm wheelbase, 377 cm with short wheelbase and 419.6 cm with long wheelbase), frame width 161.5 cm; weight of the frame, in running order, variable according to the wheelbase (Kg 820 with the wheelbase of 293.2 cm, Kg 805 with the short wheelbase and Kg 845 with the long wheelbase
- Performance : maximum speed (with the longest gear ratio) about 110 km / h (max speed in the various gears: 28 in 1st, 46 in 2nd, 67 in 3rd, about 110 in 4th)