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The Doctor



Member Since: 09 Jul 2010
Location: Gallifrey
Posts: 4612

United Kingdom 
Engine warm up time - Petrol vs diesel

I suspect this is to do with the age and technology, but my 2008 Golf 1.9 TDi always took ages for the engine to warm up and the heater was also slow to warm up but was great when it got there. The 2013 Audi A3 I have got now (petrol) warms up very quickly indeed, much like the Fiesta ST I had.

Thinking back a few years though, I am sure the 2000 Focus petrol warmed up faster than the 2003 Focus TDCi I later owned. I am just curious and perhaps those with technical know how can help. Do petrol engines warm up faster than equivalent diesels and if so why? LL.B (Hons) - University of Derby
LOT (Lord of Time) - University of Gallifrey

Post #332129 1st Oct 2017 2:22 pm
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Steve D



Member Since: 19 Jan 2013
Location: Essexshire
Posts: 4091

United Kingdom 

Diesels do generally take longer to get up to working temperature because they are more thermally efficient but our Golf is one of the quickest cars we’ve had (apart from the Evoque) for a quick heat up. Normally blowing warm air after less than a minute. Yours should have done too Doc and I understand they all have electric auxiliary heaters. Perhaps yours wasn’t working or perhaps you have one now that is working on your A3?

Edit: Have a read of this - http://uk-mkivs.net/topic/49719-auxiliary-heater/ Past: FL2 TD4 HSE Auto
Evoque SD4 Dynamic Lux Auto
Present: Audi A3 S Line.

Post #332144 1st Oct 2017 4:40 pm
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Dartman the one



Member Since: 04 Apr 2013
Location: Seville, Spain
Posts: 1650

England 

Mines up to temp in about half a mile Laughing my PC is slightly to the right of Genghis
2012 HSE SD4 In Orkney Grey now gone, best car ever.

Post #332147 1st Oct 2017 4:45 pm
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The Doctor



Member Since: 09 Jul 2010
Location: Gallifrey
Posts: 4612

United Kingdom 

Interesting stuff Steve. Maybe mine was acting up along with the other issue with loss of power. I’ll see how the A3 gets on when we get our first frosty morning. LL.B (Hons) - University of Derby
LOT (Lord of Time) - University of Gallifrey

Post #332149 1st Oct 2017 4:53 pm
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Steven.T



Member Since: 08 Nov 2015
Location: Stockton-On-Tees
Posts: 219

United Kingdom 2009 Freelander 2 TD4_e GS Manual Lago Grey

My old 2001 petrol fiesta used to heat up within minutes, was fantastic for cold mornings!

Post #332246 2nd Oct 2017 5:31 pm
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Lightwater



Member Since: 21 Aug 2014
Location: Sydney Northern Beaches
Posts: 4704

Ukraine 2013 Freelander 2 2.0T SE Auto Fuji White

About 1.3 km for the petrol engine. Procrastination, mankind's greatest labour saving device!

Acoustic insulation ARB TPMS 3xARB air compressors After cooler Air tank On-board OCD pressure air/water cleaning Additional 50L fuel Carpet in doors ABE 2x1kg Waeco 28L modified fridge Battery 4x26ah Solar 120w Victron MPPT 100/20 DC-DC 18amps 175amp jumper plug Awning 6x255/60R18

Post #333007 11th Oct 2017 5:31 am
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jules



Member Since: 13 Dec 2007
Location: The Wilds of Warwickshire
Posts: 4518

United Kingdom 2014 Freelander 2 SD4 SE Auto Firenze Red

In many modern vehicles warm air is often produced early after startup by a PTC heater or equivalent before the engine warms up. So having warm air doesnt mean your engine is all toasty.

The other thing to remember, if worried about engine wear, is that the oil temp will lag behind water temp for some time. However most cars dont have an oil temp gauge and my BMW didnt even have a water temp gauge - which was annoying as it took about 6 miles to get the water warm let alone the oil as monitored by Torque Pro - it was not a car for short runs . Jules

Post #333028 11th Oct 2017 8:58 am
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