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.