EA828 or audi R5 engines

The Audi EA828 family of 5-cylinder engines was produced by the company from 1977 to 1997 and was installed on almost all mass medium-sized models of the German concern. After the end of production, this line was reborn into the popular EA855 series motors in the USA.

First 1.9 and 2.1 liter engines

In 1976, Audi engineers introduced the second generation of the model under the index 100 and a family of 5-cylinder units, developed on the basis of EA827 4-cylinder engines. These engines would later form the basis for the famous five-cylinder diesel series.

The first line consisted of three engines of 1.9 and 2.1 liters, they were distinguished only by the piston stroke:

• WH (10v / Keihin 28-32, 100 hp / 132 Nm);
• WB (10v / Zenith 2B3, 115 hp / 166 Nm);
• WC (10v / K-Jetronic, 136 hp / 185 Nm).

These engines had a fairly progressive design for their time: the aluminum SOHC cylinder head was on top of the cylinder block, and the camshaft was rotated by a belt. Their main difference from the 4-cylinder counterparts was the absence of an intermediate shaft.

Engines EA828 2.0 and 2.2 liters

In 1984, updated 2.0 and 2.2 liter engines debuted on the third generation of the Audi 100. It was possible to increase the working volume of the motor by increasing the piston diameter from 79.5 to 81 mm.

We summarized the characteristics of the most popular power units in a table:

• SL (10v / K-Jetronic, 113 hp / 165 Nm);
• KP (10v / K-Jetronic, 115 hp / 170 Nm);
• RT (10v / KE-Jetronic, 115 hp / 172 Nm);
• KZ (10v / KE-Jetronic, 115 hp / 165 Nm);
• PX (10v / K-Jetronic, 120 hp / 172 Nm);
• KU (10v / K-Jetronic, 138 hp / 188 Nm);
• HX (10v / K-Jetronic, 138 hp / 188 Nm).

Engines EA828 2.3 liters

Already in 1986, the diameter of the pistons in the engine was again increased, this time from 81.0 to 82.5 mm. The resulting line of units became the most popular in the series and was produced until 1997.

Four motors are widely used, the characteristics of which we have summarized in a table:

• NF (10v / KE-III-Jetronic, 136 hp / 190 Nm);
• NG (10v / KE-III-Jetronic, 133 hp / 182 Nm);
• AAR (10v / KE-III-Jetronic, 133 hp / 186 Nm);
• 7A (20V / Hitachi, 170 hp / 220 Nm).

The most powerful of them, an engine with a cylinder head for 20 valves, was installed on all-wheel drive Audi 90.

EA828 series turbo engines

The sports department of the company immediately wanted to equip these engines with a turbocharger. The Audi Quattro with such an engine achieved particular success; in the 80s it had no equal in rallying.

These turbo engines are also found on civilian cars, we have summarized the most popular ones in a table:

• MC (10v / K-Jetronic, 165 hp / 240 Nm);
• AAN (20V / Motronic, 230 hp / 350 Nm).

15 years after the end of the EA828, five-cylinder engines returned in the form of the EA855 series, which was very popular in North and South America, as well as in the Middle East.