| 11 version of the engine | 123 | | Typ | 518 | 518i | 518i | 520i | 520i |
| Engine | benzynowy | benzynowy | benzynowy | benzynowy | benzynowy |
| Type of injection | gaźnik | pośredni MPI | pośredni MPI | pośredni MPI | pośredni MPI |
| Engine Code | M10B18 | M10B18 | M10B18 | M20B20 | M20B20 |
| Years of mounting | 1981-1984 | 1981-1984 | 1983-1988 | 1981-1985 | 1985-1987 |
| Cylinders/valves | R4/8 | R4/8 | R4/8 | R6/12 | R6/12 |
| Displacement [cm³] | 1766 | 1766 | 1766 | 1990 | 1990 |
| Power [kW/PS/RPM] | 66/90/5500 | 75/102/5800 | 77/105/5800 | 92/125/5800 | 95/129/6000 |
| Torque [Nm/RPM] | 140/4000 | 135/4500 | 145/4500 | 165/4500 | 174/4300 |
| Timing gear | łańcuch | łańcuch | łańcuch | pasek | pasek |
| Particle filter | - | - | - | - | - |
| Gearbox | manualna 4,5b | manualna 5b | manualna 5b | man. 4,5b/aut. 3b | manual. 5b/aut. 4b |
| Drivetrain | tylny | tylny | tylny | tylny | tylny |
| Brakes, front/rear | tarcz./tarcz. | tarcz./tarcz. | tarcz./tarcz. | tarcz./tarcz. | tarcz./tarcz. |
| Front suspension | kol. MacPhersona | kol. MacPhersona | kol. MacPhersona | kol. MacPhersona | kol. MacPhersona |
| Rear suspension | wielowahaczowe | wielowahaczowe | wielowahaczowe | wielowahaczowe | wielowahaczowe |
| Curb weight [kg] | 1160 | 1160 | 1140 | 1220/1230 | 1270/1290 |
| Body dimensions [mm] | 4620/1700/1415 | 4620/1700/1415 | 4620/1700/1415 | 4620/1700/1415 | 4620/1700/1415 |
| Luggage capacity [l] | 460 | 460 | 460 | 460 | 460 |
| Acceleration 0-100km/h (0-62mph) [s] | 14,0 | 13,7 | 12,6 | 11,8/14,4 | 11,4/13,3 |
| Top speed [km/h] | 164 | 172 | 175 | 185/179 | 190/184 |
| Fuel cons. (city/h-way/comb.) [l/100km] | 11,1/7,0/9,2 | - / - /9,3 | 9,9/6,1/8,0 | 11,9/7,8/9,9 | 11,4/6,3/8,7 |
| Fuel tank capacity [l] | 70 | 70 | 70 | 70 | 70 |
| Ratio kg/PS | 12.89 | 11.37 | 10.86 | 9.76/9.84 | 9.84/10 |