Diverging. The Yanmah diesel in the yacht was 8.5 horse power (I suspect more like Shetland Ponies!) and weighed 80kg. Ah, but the fuel flow! 0.85 of a litre at full throttle!
On that basis a 100 HP diesel donk for a Cessna 150 would weigh 960 KG and burn 10 litres per hour.............
