Not all of the glow plugs are working
Dont smoke
Could be a bad head gasket and/or a cracked head.
its most likely vapor.. but if you recently changed the oil and a little spilled on the engine it could smoke because of the oil burning.. its most likely nothing serious.
Generally speaking, black smoke is fuel; blue/grey smoke is oil; and white smoke is water. Heavy white smoke is trans fluid. On a Range Rover it can only be water. The bad news is you have a blown head gasket or worse, depending on the year. if your Rover is 4.0/4.6 you could also have a slipped sleave in your engine block. This is common on higher millage engines, but I have seen it as early as 55k miles. Perform a block test to verify. Also remove the center 2 spark plugs on each side and check for pink/orange discoloration that looks like coolant.
Blown head gasket
Some smoke alarms beep when the power goes out because they are hardwired to the power system and resetting. Not all smoke alarms are hard wired to the building's electrical system.
loss of power after,or with black smoke , indicates the turbo has quit.
black smoke.
Because the smoke detector uses power while trying to detect smoke.
If is a whitesh smoke then the head gasket has likely blown. The coolant is what gives it that color. If it is a bluesh/blackesh color then a piston or valve has been damaged. This is the common causes.
sources of smoke include emissions from vehicles and power stations
in a diesel engine, no power and blowing white smoke, indicates a bad turbo on the engine