| 22 version of the engine | 12345 | | Typ | 318i | 318i | 318is | 320i | 320i |
| Engine | benzynowy | benzynowy | benzynowy | benzynowy | benzynowy |
| Type of injection | pośredni MPI | pośredni MPI | pośredni MPI | pośredni MPI | pośredni MPI |
| Engine Code | M40B18 | M40B18 | M42B18 | M20B20 | M20B20 |
| Years of mounting | 1987-1991 | 1987-1991 | 1989-1991 | 1982-1985 | 1985-1991 |
| Cylinders/valves | R4/8 | R4/8 | R4/16 | R6/12 | R6/12 |
| Displacement [cm³] | 1796 | 1796 | 1796 | 1990 | 1990 |
| Power [kW/PS/RPM] | 83/113/5500 | 85/115/5500 | 100/136/6000 | 92/125/5800 | 95/129/6000 |
| Torque [Nm/RPM] | 162/4250 | 165/4250 | 172/4600 | 170/4000 | 174/4000 |
| Timing gear | pasek | pasek | łańcuch | pasek | pasek |
| Particle filter | - | - | - | - | - |
| Gearbox | manual. 5b/aut. 4b | manual. 5b/aut. 4b | manualna 5b | manual. 5b/aut. 4b | manual. 5b/aut. 4b |
| Drivetrain | tylny | tylny | tylny | tylny | tylny |
| Brakes, front/rear | tarczowe/bębnowe | tarczowe/tarczowe | tarczowe/tarczowe | tarczowe/tarczowe | tarczowe/tarczowe |
| Front suspension | kol. MacPhersona | kol. MacPhersona | kol. MacPhersona | kol. MacPhersona | kol. MacPhersona |
| Rear suspension | wielowahaczowe | wielowahaczowe | wielowahaczowe | wielowahaczowe | wielowahaczowe |
| Curb weight [kg] | 1065/1085 | 1065/1085 | 1125 | 1060/1080 | 1125/1145 |
| Body dimensions [mm] | 4325/1645/1380 | 4325/1645/1380 | 4325/1645/1360 | 4325/1645/1380 | 4325/1645/1380 |
| Luggage capacity [l] | 425 | 425 | 425 | 425 | 425 |
| Acceleration 0-100km/h (0-62mph) [s] | 10,8/12,0 | 10,8/12,0 | 9,9 | 10,4/12,0 | 10,2/12,0 |
| Top speed [km/h] | 188/186 | 189/185 | 202 | 196/191 | 197/192 |
| Fuel cons. (city/h-way/comb.) [l/100km] | 10,6/7,0/8,8 | 10,6/7,0/8,8 | 10,9/6,4/8,5 | 11,1/6,3/8,5 | 12,0/6,4/8,9 |
| Fuel tank capacity [l] | 55 | 55 | 55 | 55 | 55 |
| Ratio kg/PS | 9.42/9.6 | 9.26/9.43 | 8.27 | 8.48/8.64 | 8.72/8.88 |