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Ponio85

New Member

• Dec 21, 2015

• #1

Hi. Guys desperate looking for my dreaming range rover sport but still can't decide which engine to choice? I'm only after petrol and will be converted on lpg like my other big cars. Never been fan of diesel only petrol. So which one is better? 4.4 or 4.2 super charged? Any common faults in this engines??? Please help. Thanks for your help.
Best Regards
Mario ( polish lad )

 

cooltide

sheep fancier

• Dec 21, 2015

• #2

Both suffer from valve seat recession on lpg so neither unfortunately

 

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dolphinboy

Active Member

• Dec 21, 2015

• #3

The bmw 4.4 V8 is fine on lpg and doesn't suffer from valve seat recession. The 4.2 jag engine does and needs valve lubrication.

My is a STAG system (from Poland!) and has been fault free in 5 years and 50,000 miles. BRC is another good make but most important is the fitter and the set up.

 

cooltide

sheep fancier

• Dec 22, 2015

• #4

^^^ sport. Isn't the 4.4 also a jag engine.

 

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td5essex

Member

• Dec 23, 2015

• #5

The 4.4 BMW engine is fine with LPG but apparently the 4.2/4.4 Jag engines are not and indeed suffer from valve seat recession! Don't all the RRS have Jag engines?

 

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eightinavee

Well-Known Member

• Dec 23, 2015

• #6

Yup.

td5essex said:

The 4.4 BMW engine is fine with LPG but apparently the 4.2/4.4 Jag engines are not and indeed suffer from valve seat recession! Don't all the RRS have Jag engines?

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