Car cooling systems are vastly more complex these days - besides huge heat surges from the turbo, fancy warm up cycles, engine/gearbox oil cooling etc, a lot of manufacturers cite the way their engines are slow to cool after shut down so that if they are restarted after a short or medium period (0.5-4 hours?) the engine is still warm enough to give immediately good emissions and fuel efficiency performance....not the case with a "cold" start
The packaging in the Morgan application is very different to BMW so it is likely the cooling systems in the Plus Four/Six will not have had the same level of detailed development....
