1966 Lotus Elan S2 S/E

1966 Lotus Elan S2 S/E

As the Elan became more of a commercial success, Lotus began to offer a different options including the S/E package with more features. It was immediately distinguished with knock-off wheels and small S/E badge on the fender.

The S/E was a heavier car with some interior more appointments such as safety belts and deluxe carpeting and a dual-circuit master cylinder with vacuum assist.

It also got a “C” camshaft that raised power to 115 hp from the standard 95 hp version.

The S2 introduced a full-width veneer wood dash with a lockable glove compartment. The car also got clustered rear taillights.

For the S2, Lotus cast their own block as Ford stopped production of the Ford Cortina 116E. The new 2731E block was virtually identical, but the cylinder-head featured a new stiffening rib between spark plus #2 and #3. Detail upgrades included iron tappet sleeves, stronger 125E connecting rods and a 6-bolt flywheel.


In Detail

typeSeries Production Car
built atEngland
engineLotus 2731E Inline-4
positionFront, Longitudinal
ignitionLucas 25D4 Distributor
block materialCast-Iron w/Aluminum Cylinder Head
valvetrainChain Driven DOHC, 2 Valves per Cyl
fuel feed2 Weber DCOE/2 Sidedraft Carburettors
displacement1588 cc / 96.91 in³
bore82.6 mm / 3.3 in
stroke72.8 mm / 2.9 in
power78.3 kw / 115 bhp @ 6250 rpm
specific output72.42 bhp per litre
bhp/weight162.43 bhp per tonne
torque143.7 nm / 106 ft lbs @ 5000 rpm
body / frameMonocoque Fiberglass Body over Pressed Steel Chassis
driven wheelsRWD
wheel typeKnock-off Steel Discs
front tires5.20-13 Dunlop SP 41
rear tires5.20-13 Dunlop SP 41
front brakesGirling Discs
rear brakesGirling Discs
front wheelsF 33.0 x 11.4 cm / 13 x 4.5 in
rear wheelsR 33.0 x 11.4 cm / 13 x 4.5 in
steeringTriumph Rack & Pinion
f suspensionWishbones w/Coil Springs, Anti-Sway Bar
r suspensionHalf Shafts w/Lateral Link, Coil Springs, Anti-Sway Bar
curb weight708 kg / 1560 lbs
weight distro48 % / 52 %
wheelbase2133 mm / 84 in
front track1193 mm / 47 in
rear track1193 mm / 47 in
length3683 mm / 145 in
width1422 mm / 56 in
height1168 mm / 46 in
transmissionFord 4-Speed Manual
tran clutch8.5-Inch Dry Plate
gear ratios2.92:1, 2.51:1, 1.64:1, 1.00:1
fuel capacity45.42 litres or 12 gal.