Sierra 'E-Max' Economy 1600

The Sierra 1.6 Economy has a new computer-controlled ignition system, factory computer-set timing, a special long-striding differential for its five-speed gearbox, low rolling resistance tyres and informative dash-mounted econolights, along with a timed cut-off heated rear window. At a steady 56mph the 1.6 Economy returns 51.4mpg, amazing for a car this size - Ford Literature

• The E-Max 1600 was introduced in the early 80’s, and was a tentative step taken by Ford towards lean burn combustion in the interests of fuel economy. This engine differs from the standard OHC 1600 ‘pinto’ engine in several areas including; a much longer stroke with a smaller cylinder bore configuration along with smaller valves in the cylinder head. A different carburettor, a Lucas ‘hall effect’ distributor and an ESC (Electronic Spark Control) system are also used. The ESC system has a range of spark advance settings stored in its memory, and a suitable setting is selected for the relevant engine speed and load, meaning that the degree of advance can be constantly varied, again in the interests of fuel economy. The E-Max's final drive (differential) ratio is 3.38:1 (3.62:1 is the standard ratio for the 1600).

• - 1597cc OHC “Pinto” E-Max lean burn engine. 4 Cylinder in-line. Weber 2V type carburettor with automatic choke. Electronic breakerless ignition. Max output - 75PS (DIN) at 5300rpm. Max torque - 120Nm at 2900rpm. 0-60mph - 13.3 seconds. Max Speed - 103mph. 30.1mpg on a simulated urban cycle rising to 51.4mpg at a constant 56mph.

• Bore - 81.32mm (compared to usual 87.67mm)
• Stroke - 76.95mm (compared to usual 66.00mm)