| 1 | A | B | C | D | E | F | G |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2 | Saab H engine - B204 & B234 |  |  |  |  |  |  |
| 3 | Engine | Power | Torque | Compression ratio | Bore x Stroke | Rod Length | Boost pressure |
| 4 | B204i: | 130 hp (97 kW) @ 5500 rpm | 177 N⋅m (131 lb⋅ft) @ 4300 rpm | 10.1:1 | 90 mm × 78 mm (3.54 in × 3.07 in) | 153 mm (6.0 in) | NA |
| 5 | B204E: | 154 hp (115 kW) @ 5500 rpm | 219 N⋅m (162 lb⋅ft) @ 3600 rpm | 9.2:1 | 90 mm × 78 mm (3.54 in × 3.07 in) | 153 mm (6.0 in) | 0.4 bar (5.8 psi) |
| 6 | B204L: | 185 hp (138 kW) @ 5500 rpm | 263 N⋅m (194 lb⋅ft) @ 2100 rpm | 9.2:1 | 90 mm × 78 mm (3.54 in × 3.07 in) | 153 mm (6.0 in) | 0.73 bar (10.6 psi) |
| 7 | B204R: | 205 hp (153 kW) @ 5500 rpm | 280 N⋅m (207 lb⋅ft) @ 2200 rpm | 9.2:1 | 90 mm × 78 mm (3.54 in × 3.07 in) | 153 mm (6.0 in) | 1 bar (15 psi) |
| 8 | B234i 1990-1993: | 150 hp (112 kW) @ 5500 rpm | 212 N⋅m (156 lb⋅ft) @ 3800 rpm | 10.1:1 | 90 mm × 90 mm (3.54 in × 3.54 in) | 147 mm (5.8 in) | NA |
| 9 | B234i 1994-: | 150 hp (112 kW) @ 5600 rpm | 210 N⋅m (155 lb⋅ft) @ 4300 rpm | 10.5:1 | 90 mm × 90 mm (3.54 in × 3.54 in) | 153 mm (6.0 in) | NA |
| 10 | B234E: | 170 hp (127 kW) @ 5700 rpm | 260 N⋅m (192 lb⋅ft) @ 2100 rpm | 9.25:1 | 90 mm × 90 mm (3.54 in × 3.54 in) | 147 mm (5.8 in) | 0.55 bar (8.0 psi) |
| 11 | B234L: 1990-1993 | 200 hp (149 kW) @ 5500 rpm | 329 N⋅m (243 lb⋅ft) @ 1900 rpm 5MT | 8.5:1 | 90 mm × 90 mm (3.54 in × 3.54 in) | 147 mm (5.8 in) | 0.81 bar (11.7 psi) |
| 12 | B234L 1994-1998: | 200 hp (149 kW) @ 5500 rpm | 323 N⋅m (238 lb⋅ft) @ 1800 rpm 5MT | 9.25:1 | 90 mm × 90 mm (3.54 in × 3.54 in) | 147 mm (5.8 in) | 0.81 bar (11.7 psi) |
| 13 | B234R: | 225 hp (168 kW) @ 5500 rpm | 342 N⋅m (252 lb⋅ft) @ 1950 rpm | 9.25:1 | 90 mm × 90 mm (3.54 in × 3.54 in) | 147 mm (5.8 in) | 1.08 bar (15.7 psi) |

Question: How many generations of the B234 engine are there, and what years were each generation made?
Answer: There are two generations of B234 engine, one made from 1990-1993, the other from 1994 to 1998.