HP difference between round head 850 vs 1000

[T4halo]

I’m comparing the standard 850 T/T3 motor to the 1000 SP/G5. I know there is only 100cc difference but would like to hear real world comparison. The numbers are pretty close from what I’ve read. Many here have had both.

T4

[Perazzimx14]

Going by numbers posted on the internet the 850T (844cc) produces about 55hp. The SP1000 (948cc) produces about 61hp in stock trim. I think they mean Clydesdale verses Quarter Horse Horse power  when referencing Guzzi.

[mtiberio]

What kind of differences? Dimensional? Horsepower? Torque? The heads are the same AFAIK. The holes in the block for the cylinders are about .020" bigger on a 950 motor.

[T4halo]

I understand it's a bigger bore, but didn't know the heads were the same.  6 HP might  make a small difference.  Both are good motors.

[pete roper]

83 vs. 88 mm bore. The 950 makes a little more torque and vibrates slightly more. If you really wring them out the 950 may make a tiny bit more power but the real limiting factor is the port size and carburettor choke size.

[travelingbyguzzi]

I have always felt ,in my limited experience, two of each, that the 850 was smoother. Maybe a bit less bottom end, but I have always likes the 850s.

[guzzista]

I have always felt ,in my limited experience, two of each, that the 850 was smoother. Maybe a bit less bottom end, but I have always likes the 850s.

+1

[Chuck in Indiana]

Yeah.. me, too.