BMW 5 Series (E34)
Petrol

Model
Years
Engine
Power
Torque
518i
1989–1994
M40B18 4-cyl
83 kW (111 hp) at 5,500 rpm
165 N⋅m (122 lb⋅ft) at 4,250 rpm
518i
1994–1996
M43B18 4-cyl
85 kW (114 hp) at 5,500 rpm
168 N⋅m (124 lb⋅ft) at 3,900 rpm
520i
1988-1990
M20B20 6-cyl
95 kW (127 hp) at 6,000 rpm
174 N⋅m (128 lb⋅ft) at 4,000 rpm
520i
1989-1992
M50B20 6-cyl
110 kW (148 hp) at 6,000 rpm
190 N⋅m (140 lb⋅ft) at 4,700 rpm
520i
1992-1996
M50B20TU 6-cyl
110 kW (148 hp) at 5,900 rpm
190 N⋅m (140 lb⋅ft) at 4,200 rpm
525i
1988-1991
M20B25 6-cyl
125 kW (168 hp) at 5,800 rpm
222 N⋅m (164 lb⋅ft) at 4,300 rpm
525i
1991-1992
M50B25 6-cyl
141 kW (189 hp) at 6,000 rpm
245 N⋅m (181 lb⋅ft) at 4,700 rpm
525i
1992-1996
M50B25TU 6-cyl
141 kW (189 hp) at 5,900 rpm
250 N⋅m (184 lb⋅ft) at 4,200 rpm
530i
1988-1991
M30B30 6-cyl
138 kW (185 hp) at 5,500 rpm
260 N⋅m (192 lb⋅ft) at 4,300 rpm
530i
1992-1996
M60B30 V8
160 kW (215 hp) at 5,800 rpm
290 N⋅m (214 lb⋅ft) at 4,500 rpm
535i
1987-1992
M30B35 6-cyl
155 kW (208 hp) at 5,700 rpm
305 N⋅m (225 lb⋅ft) at 4,000 rpm
540i
1992–1996
M60B40 V8
210 kW (282 hp) at 5,800 rpm
400 N⋅m (295 lb⋅ft) at 4,500 rpm
M5
1988–1992
S38B36 6-cyl
232 kW (311 hp) at 6,900 rpm
360 N⋅m (266 lb⋅ft) at 4,750 rpm
M5
1992–1996
S38B38 6-cyl
250 kW (335 hp) at 6,900 rpm
400 N⋅m (295 lb⋅ft) at 4,750 rpm

Question: In what engine type was the E34 M5 originally available and what was the power output before and after upgrades?
Answer: The E34 M5 was originally available in an S38 6-cyl engine with an output of 232 kW (311 hp) and later upgraded to produce 250 kW (335 hp).