Petrol engines
| Model Power | Displacement | Cylinder | Camshaft drive system Timing belt or chain |
|---|---|
| Alfa 156 1.6 TS 16V (1997 – 2000) 88 kW / 118 hp / 120 PS | 1598 cc | 4 | timing belt |
| Alfa 156 1.6 TS 16V (2000 – 2005) 88 kW / 118 hp / 120 PS | 1598 cc | 4 | timing belt |
| Alfa 156 1.8 TS 16V 103 kW / 138 hp / 140 PS | 1747 cc | 4 | timing belt |
| Alfa 156 1.8 TS 16V 106 kW / 142 hp / 144 PS | 1747 cc | 4 | timing belt |
| Alfa 156 2.0 TS 16V 110 kW / 148 hp / 150 PS | 1747 cc | 4 | timing belt |
| Alfa 156 2.0 TS 16V 114 kW / 153 hp / 155 PS | 1970 cc | 4 | timing belt |
| Alfa 156 2.0 JTS 16V 122 kW / 164 hp / 166 PS | 1970 cc | 4 | timing belt |
| Alfa 156 2.5 V6 24V 140 kW / 188 hp / 190 PS | 2492 cc | 6 | timing belt |
| Alfa 156 2.5 V6 24V 141 kW / 189 hp / 192 PS | 2492 cc | 6 | timing belt |
| Alfa 156 3.2 V6 GTA 184 kW / 247 hp / 250 PS | 3179 cc | 6 | timing belt |
Diesel engines
| Model Power | Displacement | Cylinder | Camshaft drive system Timing belt or chain |
|---|---|
| Alfa 156 1.9 8V JTD 77 kW / 103 hp / 105 PS | 1910 cc | 4 | timing belt |
| Alfa 156 1.9 8V JTD 81 kW / 109 hp / 110 PS | 1910 cc | 4 | timing belt |
| Alfa 156 1.9 8V JTD 85 kW / 114 hp / 115 PS | 1910 cc | 4 | timing belt |
| Alfa 156 2.4 10V JTD 100 kW / 134 hp / 136 PS | 2387 cc | 5 | timing belt |
| Alfa 156 2.4 10V JTD 103 kW / 138 hp / 140 PS | 2387 cc | 5 | timing belt |
| Alfa 156 1.9 16V JTD M-Jet 103 kW / 138 hp / 140 PS | 1910 cc | 4 | timing belt |
| Alfa 156 1.9 16V JTD M-Jet 110 kW / 148 hp / 150 PS | 1910 cc | 4 | timing belt |
| Alfa 156 2.4 10V JTD 110 kW / 148 hp / 150 PS | 2387 cc | 5 | timing belt |
| Alfa 156 2.4 20V JTD M-Jet 129 kW / 173 hp / 175 PS | 2387 cc | 5 | timing belt |
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