Rolls-Royce RB211-524C2
On the 747SP it seems to have a special version with same name.
747-200C, 747-200B, 747-100
Thrust: 51,500
Weight: 9,859
Fuel Flow: 72,100
747-SP
Thrust: 46,500
Weight: 8,500
Fuel Flow: 66,960
Also for the pricing,
On the 747-200's it increases the price by 480k,
On the 747SP it decreases by 800k
On the 747-100 it decreases by 600k
So the oldest 747 gets a price discount, then they hike the price up?