| model/silnik | paliwo | moc fabryczna | wzrost mocy | moment obrotowy | oszczedność paliwa | wzrost mocy | moment obrotowy |
| Alfa Romeo 156 1.9 JTD 16V M-Jet (140/150 HP) | On | 140/150 KM | + 22 KM | + 50 Nm | do 15 % | + 38 KM | + 70 Nm |
| Alfa Romeo 156 1.9 JTD 8V (105/110/115 HP) | On | 105/110/115 KM | + 22 KM | + 50 Nm | do 15 % | + 38 KM | + 70 Nm |
| Alfa Romeo 156 2.4 JTD 10V (136/140/150 HP) | On | 136/140/150 KM | + 28 KM | + 55 Nm | do 15 % | + 40 KM | + 85 Nm |
| Alfa Romeo 156 2.4 MJET 20V | On | 175 KM | + 30 KM | + 60 Nm | do 15 % | + 40 KM | + 85 Nm |
| Alfa Romeo 156 SPORTWAGON Q4 1.9 JTD | On | 150 KM | + 28 KM | + 60 Nm | do 15 % | + 38 KM | + 70 Nm |
| Alfa Romeo 156 1.6 Twin Spark 16V (120/122 HP) | Pb | 120/122 KM | - | - | - | + 8 KM | + 12 Nm |
| Alfa Romeo 156 1.8 Twin Spark 16V (140/144 HP) | Pb | 140/144 KM | - | - | - | + 13 KM | + 16 Nm |
| Alfa Romeo 156 2.0 Twin Spark 16V (150/154 HP) | Pb | 150/154 KM | - | - | - | + 15 KM | + 22 Nm |
| Alfa Romeo 156 2.0 Twin Spark 16V Selespeed | Pb | 150 KM | - | - | - | + 15 KM | + 22 Nm |
| Alfa Romeo 156 2.5 V6 24V Q-System | Pb | 192 KM | - | - | - | + 18 KM | + 24 Nm |
| Alfa Romeo 156 2.5 V6 24V Selespeed | Pb | 192 KM | - | - | - | + 18 KM | + 24 Nm |
| Alfa Romeo 156 2.5 V6 24V | Pb | 192 KM | - | - | - | + 18 KM | + 24 Nm |
| Alfa Romeo 156 3.2 V6 GTA 24V Selespeed | Pb | 250 KM | - | - | - | + 24 KM | + 29 Nm |
| Alfa Romeo 156 3.2 V6 GTA 24V | Pb | 250 KM | - | - | - | + 24 KM | + 29 Nm |
