Does anyone know how the SD4 can have more BHP than the TD4 but have exactly the same consumption figures ?.

Probably down to the fact the engine doesn't have to work as hard to propel the vehicle.

The manual TD4 (in theory) has a better fuel consumption than both the TD4 and SD4 automatics.

The cycle on which the emissions and fuel economy are measured does not use full load (full power) from the engine so the two different areas of the fuelling map can be calibrated independently. The SD4 max/power fuel and turbo settings are different from TD4 but the road load map is the same. Gone... 2013 XS TD4 Manual Firenze Red
Gone... 2008 (09MY) XS Td4 Manual Stornaway Grey
Prior... 2003 G4 Discovery 2, 1998 Disco 1 and 1997 Disco 1 Company car before that
Also gone in Nov'13, after 7.5 yrs, to new owners with time for more TLC - 1980 Series III 88
Current 2015 Discovery Sport HSE 2.0

You will often get more MPG out of a bigger engine/higher powered one up to a point with the same body.
For instance a Ford Escort L 1300cc say does 40mpg but a Ford Escort GT with a 1600cc engine will do 45mpg, if driven carefully.
The 1300 has to be flogged through the gears to get it up hills and keep up the pace where as the 1600 will go up the same hill without changing down so the engine is more relaxed about it.
A smaller engine in the same size body doesnt always mean better economy, thats why.

The old term for it was :-

POWER TO WEIGHT RATIO...

small thinner drivers got more m p g than

big fat overweight B rs  Wales
Were the mud is thicker, and the ruts are deeper.
(And we have the water to wash it off, and more on the way..! )
Sd4 and chrome Ar*e piece, Auto box for best fun
09 Xs Gone
12 xs Gone
HSE with Leather seats and 4 years warrenty.. staying for now !

mudslinger wrote:

The old term for it was :-

POWER TO WEIGHT RATIO...

small thinner drivers got more m p g than

big fat overweight B rs

That's me knackered then!  2013 RR Evoque Pure Tech
2012 TD4 GS Auto Orkney Grey - gone

Hey Bugblatter, it's not the size of the nail, it's the hammer you hit if with damn site better than an extra 1 mpg

Bugblatter wrote:

mudslinger wrote:

The old term for it was :-

POWER TO WEIGHT RATIO...

small thinner drivers got more m p g than

big fat overweight B rs

That's me knackered then!

Me too. Who buys a Freelander for fuel economy? Prog rock is cool!
2012 XS SD4 Indus Silver

Chris B wrote:

The cycle on which the emissions and fuel economy are measured does not use full load (full power) from the engine so the two different areas of the fuelling map can be calibrated independently. The SD4 max/power fuel and turbo settings are different from TD4 but the road load map is the same.

Absolutely

The way the test is carried out, it's very easy for the manufacturers to tune for excellent mpg under the completely artificial conditions of the test and this is one example of it happening.

Ignore official mpg figures, they are completely meaningless. You're much better off going for a decent test drive and zeroing the trip computer at the beginning of the test and checking the mpg at the end. The worst example of a misleading official mpg figure I found like this was a new shape 520d touring - official mpg around 55, observed mpg over around 40 miles, around 27

Thanks all, just curious really, the figures are not just similar but exactly the same ?, 0-60 time is vastly different though. Only ask the question because we collect out new SD4 XS on Saturday having had a TD4 XS for 3 years.

Had my 10my TD4 auto ecu remapped (NOT a box) similar to SD and fuel comsumption improved by 5-8 mpg normal driving and motorway 70ish+
Also improved performance.
Same old story with Cortina 1.6 single choke Solex or VV carb against 2.0 with twin choke Webber. 2.0 far better on fuel unless driven to limit. All FL2's (3) Gone
2011 Mercedes C180 CGI Gone
FL2 GS Auto SD with heated leather, factory tints, alloy spare and a few other bits.

Hi

What was your main reason for having the remap carried out. ie fuel consumption, improve driveability etc. Plus which company carried it out.

sadler32 wrote:

Hi

What was your main reason for having the remap carried out. ie fuel consumption, improve driveability etc. Plus which company carried it out.

And what did your insurance company say about it?  2010 HSE TD4 auto, Biscay Blue, Almond Leather, facelift front and rear, detachable towbar, front & rear mudflaps, bib spoilers, clear high level brake light, smooth rear wiper, colour coded door handles.

Previous Land Rovers:
2007 Freelander 2 HSE i6 in Stornoway Grey
1991 Discovery 200tdi 3 door in blue

 Freelander 2 TD4 Auto, SE, Narvik Black, Alpaca full leather, Rear Headrest Entertainment System, 6 CD, 18 HSE Wheels, Privicy tints