Here's details for Torpedo 800s from Wesbourne Model Centres site. Look similar spec. I wouldn't imagine there would be too much difference. I've got a Torpedo 800 in my Our Lass 2 as well and it's got more than enough power, Dave.

MFA Torpedo 800 - MFA Torpedo 800/motor Ref: 2118
The Torpedo 800 is a high quality motor designed for medium sized boats up to 1.20mt ideal for cruisers giving planing speed on most .
Comes complete with Mount and power lead
Dimensions : L110mm, D51.8.0mm, Shaft diameter 6.35mm
Voltage, 12V
Off load current, 1.0A
Max current, 25A
RPM No Load : 5,100