| 7 version of the engine | 12 | | Typ | 318i | 320i | 325i | 325ix | 324td |
| Engine | benzynowy | benzynowy | benzynowy | benzynowy | turbo diesel |
| Type of injection | pośredni MPI | pośredni MPI | pośredni MPI | pośredni MPI | pompa wtryskowa |
| Engine Code | M40B18 | M20B20 | M20B25 | M20B25 | M21D24 |
| Years of mounting | 1987-1991 | 1988-1991 | 1987-1993 | 1988-1993 | 1988-1993 |
| Cylinders/valves | R4/8 | R6/12 | R6/12 | R6/12 | R6/12 |
| Displacement [cm³] | 1796 | 1990 | 2494 | 2494 | 2443 |
| Power [kW/PS/RPM] | 85/115/5500 | 95/129/6000 | 125/170/5800 | 125/170/5800 | 85/115/4800 |
| Torque [Nm/RPM] | 165/4250 | 174/4000 | 222/4300 | 222/4300 | 220/2400 |
| Timing gear | pasek | pasek | pasek | pasek | pasek |
| Particle filter | - | - | - | - | - |
| Gearbox | manual. 5b/aut. 4b | manual. 5b/aut. 4b | manual. 5b/aut. 4b | manual. 5b/aut. 4b | manual. 5b/aut. 4b |
| Drivetrain | tylny | tylny | tylny | 4x4 | 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] | 1180/1200 | 1230/1250 | 1270/1290 | 1350/1370 | 1300/1320 |
| Body dimensions [mm] | 4325/1645/1380 | 4325/1645/1380 | 4325/1645/1380 | 4325/1662/1400 | 4325/1645/1380 |
| Luggage capacity [l] | 370/1125 | 370/1125 | 370/1125 | 370/1125 | 370/1125 |
| Acceleration 0-100km/h (0-62mph) [s] | 11,5/12,9 | 11,5/13,2 | 8,8/10,1 | 9,7/11,2 | 12,3/13,3 |
| Top speed [km/h] | 189/185 | 196/195 | 214/212 | 208/206 | 187/182 |
| Fuel cons. (city/h-way/comb.) [l/100km] | 10,2/6,2/8,1 | 12,0/6,4/8,9 | 12,9/7,2/9,7 | 13,7/8,1/10,5 | 8,9/5,2/7,0 |
| Fuel tank capacity [l] | 55 | 55 | 55 | 55 | 55 |
| Ratio kg/PS | 10.26/10.43 | 9.53/9.69 | 7.47/7.59 | 7.94/8.06 | 11.3/11.48 |