| 21 version of the engine | 12345 | | Typ | 320is | 323i | 323i | 325e | 325e |
| Engine | benzynowy | benzynowy | benzynowy | benzynowy | benzynowy |
| Type of injection | pośredni MPI | pośredni MPI | pośredni MPI | pośredni MPI | pośredni MPI |
| Engine Code | S14B20 | M20B23 | M20B23 | M20B27 | M20B27 |
| Years of mounting | 1988-1990 | 1982-1983 | 1983-1986 | 1983-1988 | 1985-1987 |
| Cylinders/valves | R4/16 | R6/12 | R6/12 | R6/12 | R6/12 |
| Displacement [cm³] | 1990 | 2316 | 2316 | 2693 | 2693 |
| Power [kW/PS/RPM] | 141/192/6900 | 102/139/5300 | 110/150/6000 | 90/122/4250 | 95/129/4800 |
| Torque [Nm/RPM] | 210/4900 | 205/4000 | 205/4000 | 230/3250 | 231/3200 |
| Timing gear | łańcuch | pasek | pasek | pasek | pasek |
| Particle filter | - | - | - | - | - |
| Gearbox | manualna 5b | manual. 5b/aut. 4b | manual. 5b/aut. 4b | manual. 5b/aut. 4b | manual. 5b/aut. 4b |
| Drivetrain | tylny | tylny | tylny | tylny | tylny |
| Brakes, front/rear | tarczowe/tarczowe | 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] | 1180 | 1090/1110 | 1090/1110 | 1120/1130 | 1120/1130 |
| Body dimensions [mm] | 4325/1645/1380 | 4325/1645/1380 | 4325/1645/1380 | 4325/1645/1380 | 4325/1645/1380 |
| Luggage capacity [l] | 425 | 425 | 425 | 425 | 425 |
| Acceleration 0-100km/h (0-62mph) [s] | 7,9 | 9,2/10,8 | 9,0/10,7 | 10,1/11,8 | 10,1/11,8 |
| Top speed [km/h] | 227 | 202/197 | 204/200 | 193/188 | 195/190 |
| Fuel cons. (city/h-way/comb.) [l/100km] | 12,8/6,3//9,0 | 11,8/6,3/8,8 | 11,8/6,5/8,9 | 11,5/5,9/8,4 | 11,8/5,9/8,4 |
| Fuel tank capacity [l] | 55 | 55 | 55 | 55 | 55 |
| Ratio kg/PS | 6.15 | 7.84/7.99 | 7.27/7.4 | 9.18/9.26 | 8.68/8.76 |