The long-stroke ER four-cylinder engine, sold as a 12-valve CVCC-II in Japan and as a simple eight-valve unit in Europe and Asia, was only used in the AA/VF/FA series City/Jazz from 1981 until 1986. It was available as a normally aspirated carburated version or with Honda's own PGM-FI fuel injection as one of a very few turbocharged engines built by Honda. The Japanese market CVCC engine was also known as COMBAX, an acronym of COMpact Blazing-combustion AXiom. The E-series were tuned for economy, with higher gearing and later on with computer controlled variable lean burn. As of March 1985, the naturally aspirated ER engines gained composite conrods (a world first in a production car), lighter and stronger these helped further reduce fuel consumption.
The lower powered engines in the commercial "Pro" series had a lower compression, a mechanically timed ignition rather than the breakerless setup found in the passenger cars, and a manual choke. The ER had five crankshaft bearings and the overhead camshaft was driven by a cogged belt.
| Engine type | Inline four, SOHC CVCC-II 12-valve | |||
| Displacement | 1,231 cc (75.1 cu in) | |||
| Bore x stroke | 66.0 x 90.0 mm | |||
| Fuel type | Leaded (export) or unleaded (domestic) | |||
| power | torque | fuel feed | compression | notes |
|---|---|---|---|---|
| 33 kW (45 PS) DIN at 4500 rpm | 82 N·m (60 ft·lb) at 2500 rpm | 1 bbl carburetor | 10,2:1 (normal) | European market |
| 41 kW (56 PS) DIN at 5000 rpm | 93 N·m (69 ft·lb) at 3500 rpm | 2 bbl carburetor, manual choke | 10,2:1 (super) | European market (ER1 & ER4 engine) |
| 61 PS (45 kW) JIS at 5000 rpm | 9.8 kg·m (96 N·m; 71 lb·ft) at 3000 rpm | 2 bbl carburetor | 9,0:1 (unleaded) | Pro T, Pro F |
| 63 PS (46 kW) JIS at 5000 rpm | 10.0 kg·m (98 N·m; 72 lb·ft) at 3000 rpm | 2 bbl carburetor | 10,0:1 (unleaded) | E-series, U, R (AT), Cabriolet (AT) |
| 67 PS (49 kW) JIS at 5000 rpm | 10.0 kg·m (98 N·m; 72 lb·ft) at 3500 rpm | 2 bbl carburetor | 10,0:1 (unleaded) | R and Cabriolet with MT |
| 100 PS (74 kW) JIS at 5500 rpm | 15.0 kg·m (147 N·m; 108 lb·ft) at 3000 rpm | FI, turbo | 7,5:1 (unleaded) | City Turbo |
| 110 PS (81 kW) JIS at 5500 rpm | 16.3 kg·m (160 N·m; 118 lb·ft) at 3000 rpm | FI, turbo + intercooler | 7,6:1 (unleaded) | Turbo II "Bulldog" |
Carburetor versions used either a single or 2bbl downdraft Keihin. The turbocharger in the Turbo and Turbo II was developed together with IHI, the Turbo II being equipped with an intercooler and a computer controlled wastegate.
ER1-4 Honda City
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