1971 Lotus Seven S4

The Lotus Seven S4 is a rear wheel drive road car, with the engine placed in the front, and a 2 door roadster bodyshell. The Lotus Seven S4's engine is a naturally aspirated petrol, 1.3 litre, overhead valve 4 cylinder with 2 valves per cylinder. In this application it produces 70 bhp (71 PS/52 kW) of power at 5700 rpm, and maximum torque of 92 N·m (68 lb·ft/9.4 kgm). A 4 speed manual gearbox supplies the power to the driven wheels. It weighs a quoted 594 kg at the kerb. Its maximum speed claimed is 160 km/h (99 mph).
Full specs

Body type
2 door roadster with 2 seats
Length
3716 mm
Weight
594 kg
Engine type
naturally aspirated petrol
Engine size
1.3 litre
Cylinders
4, Straight
Power
71 PS / 70 bhp / 52 kW @ 5700 rpm
Torque
92 Nm / 68 ft.lb / 9.4 kgm
Top speed
160 km/h / 99 mph

1971 Lotus Seven S4

1971 Lotus Seven S4
Carrosserie
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Carrosserie	2 seater roadster
Nombre de portes	2
Designer
Dimensions et poids
Empattement	2286	90
Voies AV	1239	48.8
Voies AR	1308	51.5
Longueur	3716	146.3
Largeur	1537	60.5
Hauteur	1086	42.8
Garde au sol	165	6.5
	1.63
Poids avec pleins	594 kg	1310
Répartition poids AV
Réservoir à essence	34 litres	7.5 [9] UK [US] gal.
Caractéristiques aérodynamique
Coefficient de pénétration
maître-couple
SCx

	naturally aspirated petrol
Constructeur du moteur
Type moteur
Cylinders	Straight 4
Cylindrée	1.3 litre 1298 cc (79.209 cu in)
Alésage × Course	81 × 63 mm 3.19 × 2.48 in
Rapport alésage / course	1.29
Distribution	overhead valve (OHV) 2 Soupapes par cylindre 8 Total vannes
Puissance maximale (DIN)	71 PS (70 bhp) (52 kW) à 5700 tr/mn
Couple maximale (DIN)	92 Nm (68 ft·lb) (9.4 kgm)
Specific output (DIN)	40.2 kW/litre 54.7 ps/litre 53.9 bhp/litre 0.88 bhp/cu in
(DIN)	70.88 Nm/litre 0.86 ft·lb/cu³
Construction	cast iron block & head
Lubrification	Carter humide
Taux de compression	9:1
Carburant	1 We carb
bmep (brake mean effective pressure)	890.7 kPa (129.2 psi)
Régime maximal	6000 tr/mn
Nombre de paliers de vilebrequin	5
Refroidissement	Water
Cylindrée Unitaire	324.5 cc
Aspiration	Normal
Compressor	N/A
Intercooler	None
Catalyseur	N
Performances
0-80km/h
0-60mph
0-100km/h
0-160km/h
0-400m
0-1000m
Vitesse	160 km/h (99 mph)
Power-to-weight ratio	Higher is better 119.48 PS/tonne (1000 kg) 0.12 PS/kg 87.88 kW/tonne (1000 kg) 0.09 kW/kg 117.85 bhp/tonne (1000 kg) 0.12 bhp/kg 0.05 bhp/lb
Weight-to-power ratio	Lower is better 11.38 kg/kW 19.01 lb/bhp
Consommation
Consommation
universal fuel consumption (calculated from the above)
litres/100km
km/litre
UK MPG
US MPG
Emissions de CO₂
Emissions de CO₂
Carfolio Calculated CO₂ ^?
VED band (UK)
CO₂ Effizienz (DE)
Châssis
Emplacement de moteur	front
Engine layout	longitudinal
Traction	rear wheel drive
Répartition du couple	N/A
Direction
turns lock-to-lock	2.800
Turning circle
Suspension AV	I.W.CS.ARB.
Suspension AR	LA.WL.CS.
Roues AV	5.5
Roues AR	5.5
Pneumatiques AV	165 x 13
Pneumatiques AR	165 x 13
Freins AV/AR	Di/Dr
Diamètre des freins AV	216 mm
Diamètre des freins AR	216 mm
Braked area
Transmission	4 speed manual
Rapport de démultiplication supérieure	1
Rapport de pont	3.77
Généralités
Carfolio.com ID	62832
Production total
Type mines
RAC rating	16.3
Insurance classification	No information available
Tax band	No information available
1971 Lotus Seven S4 added before December 1995. Last modified 2013-02-28.