So what's the difference SDV6 & TDV6

**joel0407** · 30th March 2015, 11:11 PM

I should follow on from above with there are tunes and there are tricks.

Tunes are good, tricks are usually not.

A tune is complete remap of the ECU.

A Trick is something you install the harness that will modify the signal to the ECU so it behaves differently. An example of a trick is a small box that may sit between a boost pressure sensor and the ECU to fool the ECU into seeing less boost than there really is so the ECU keeps the waste gate shut and continues to add more fuel. Yes it will give you more power and possibly more economy as a result of the extra boost but it untimatly won't be good for your motor.

Happy Days.

**Thehappyidiot** · 7th April 2015, 10:32 AM

Originally Posted by discotwinturbo

A search does not reveal this ? Where did you hear that ?

The SDV6 I thought is virtually unchanged since 2010 when it came in, but now with the tiniest bit of extra horsepower....but same torque.

Curious.

Brett....

Hi DiscoTwin,
I was told this by a mechanic who works for a LR dealership mechanical service centre...
I was looking at a few D3;s and 4;s, and I asked him what the real difference was.
Apparently the high output 180kW engines were based on the standard 2.7, bored and stroked for more output, but nothing beefed up in the downstairs department.
I got the impression that he thought the SDV6 engine was really meant for the lighter RR Sport, but that when they used it in the heavier D4, the extra weight showed up in bottom end problems.
Like you, I can't find anything about this in Dr Google, so I thought I'd ask the Guru's on AULRO..

**gghaggis** · 7th April 2015, 01:22 PM

Originally Posted by Thehappyidiot

Hi DiscoTwin,
I was told this by a mechanic who works for a LR dealership mechanical service centre...
I was looking at a few D3;s and 4;s, and I asked him what the real difference was.
Apparently the high output 180kW engines were based on the standard 2.7, bored and stroked for more output, but nothing beefed up in the downstairs department.
I got the impression that he thought the SDV6 engine was really meant for the lighter RR Sport, but that when they used it in the heavier D4, the extra weight showed up in bottom end problems.
Like you, I can't find anything about this in Dr Google, so I thought I'd ask the Guru's on AULRO..

The weight difference between a Sport and a D4 is negligible.

Cheers,

Gordon

**scarry** · 7th April 2015, 07:01 PM

Originally Posted by Thehappyidiot

Hi DiscoTwin,
I was told this by a mechanic who works for a LR dealership mechanical service centre...
I was looking at a few D3;s and 4;s, and I asked him what the real difference was.
Apparently the high output 180kW engines were based on the standard 2.7, bored and stroked for more output, but nothing beefed up in the downstairs department.
I got the impression that he thought the SDV6 engine was really meant for the lighter RR Sport, but that when they used it in the heavier D4, the extra weight showed up in bottom end problems.
Like you, I can't find anything about this in Dr Google, so I thought I'd ask the Guru's on AULRO..

Note also the 'bottom end' of the D3 2.7 is different to the D4 2.7.

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