ALCO HH series
Specifications

Overall length
45 ft 2.75 in
13.79 m
Between bolster centers:
21 ft 3 in
6.48 m
Truck wheelbase:
8 ft 0 in
2.44 m
Width over grabirons:
9 ft 10 in
3.00 m
Height above rails:
14 ft 3 in
4.34 m
Wheel diameter:
40 in
1.02 m
Fuel capacity:
-
-
Engine (HH600):
McIntosh & Seymour 531
McIntosh & Seymour 531
Power (HH600):
600 hp
450 kW
Engine (HH900):
McIntosh & Seymour 531T (turbocharged)
McIntosh & Seymour 531T (turbocharged)
Power (HH900):
900 hp
670 kW
Engine (HH660):
McIntosh & Seymour 538
McIntosh & Seymour 538
Power (HH660):
660 hp
500 kW
Engine (HH1000):
McIntosh & Seymour 538T (turbocharged)
McIntosh & Seymour 538T (turbocharged)
Power (HH1000):
1000 hp
750 kW
Main generator:
-
-
Traction motors:
-
-
Standard gearing:
-
-
Weight:
-
-

Question: Which type of engine improved upon the HH900 engine and what is the total horsepower?
Answer: The HH1000 replaced the HH900, replacing the 531 engine with the new McIntosh and Seymour 538T engine, turbocharged to produce 1000 hp (750 kW), a 100 hp increase on the previous model.