Hello smart people of the raspberry pi group.

I have a few questions for a project I'm working on.

I have a boat powered by a diesel motor. (finished the install today). However due to the engines nature being an engine for generators and other small machines and technically not a boat engine i have a few things i need monitored trough different means then normal.

I want to add a temperature meter. Rpm meter (optical if possible due to placement of sensors) and a servo controller for the throttle amount and position. (Possible pid control to match throttle amount to rpm requested) Temperature dependant fan control and timed coolant pump switching.

I thought this would be a good RPI project as i think it might be more stable then an Arduino or multiple loose systems.

The idea is having a graphic display with the measurements. As well as controlling the throttle to match the rpms programmed for the requested throttle position (pot resistor or other sensor) (This should allow slower idle as it can cut off fuel and ramp up again faster if rpms go too low. )

Temp gauge for cilinder temp and oil temp etc with overheating warning.

The temperature dependant cooling fan should be automatic switching to go on or off depending on the temperature in the engine room (small space)

And the timed cooling pump should be engaged after the engine is started with delay of 2-5sec and stop the pump 2-5sec before the engine is turned off.

I'm sure I'm missing some small things but this is the important bit of the project

Would this be possible and reliable to do with an RPI? Or would I be better off with an Arduino?