The only reason that Landrovers have traditionally had white or near white roofs is that it reduces interior temperatures quite markedly. The difference when parked in the sun in summer at the latitude of Sydney I have measured at around 7C in an ordinary car when the roof was repainted from grey to off-white. For a Series/Defender with near vertical glass (and possibly less insulation) the difference would be larger, and the effect would also increase for more vertical sunlight in lower latitudes.
John
				
			 
			
		 
			
				
			
			
				John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
			
			
		 
	
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