Xoutpost.com - What the "S" in 4.8is really means....

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- - What the "S" in 4.8is really means.... (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/1114-what-s-4-8is-really-means.html)

Jeff330xi

04-15-2005 11:53 PM

Quote:

Originally Posted by UCrewX5

I believe the "e" stood for "eta" engine (the Greek letter eta stands for the engine's efficiency)

This is the same I've heard. e = Eta.

I thought "L" was for luxury, but maybe that was just for the L6, which I think like the M6 (80s), was a US only model

-Jeff

Curious Joel

04-16-2005 12:00 AM

Quote:

Originally Posted by Jeff330xi

This is the same I've heard. e = Eta.

I thought "L" was for luxury, but maybe that was just for the L6, which I think like the M6 (80s), was a US only model

-Jeff

The L may have been true back then... But I'm pretty sure it means like Long wheelbase... Cause the 745iL, etc...

SO CONFUSING :(

Bavarian

04-16-2005 12:10 AM

Quote:

Originally Posted by Steved

I'd worry about the guy that asked the question in the first place. If he bought a 4.8is and couldn't work out why it wasn't just a 4.8i, then perhaps he should have bought a 4.4i Sport. It's a bit like asking why an M5 isn't just called a 550i... :tsk:

Although the 4.8is isn't an M car it's the closest BMW is prepared to take the X5 to the M Division philosophy, it even has the same design M dials as the M3/M5, then it has a unique engine, bigger brakes, unique suspension, unique wheels etc. Seems obvious that BMW use the 'is' designation for any sub-M brand model that goes beyond the usual 'Sport' remit (which is typically a mainly cosmetic designation).

But is the 4.8is engine unique today? I mean, now the 7-series have a 4.8L developing similar ponies. It's the same engine, isn't it?

LeMansX5

04-16-2005 09:53 AM

Quote:

Originally Posted by Bavarian

But is the 4.8is engine unique today? I mean, now the 7-series have a 4.8L developing similar ponies. It's the same engine, isn't it?

The X5 4.8is engine originally comes from the hand built ALPINA B10 V8s which got a 4.8-litre 375bhp/376lb ft V8. The 4.8is X5 uses the same engine blue-print handed to BMW by Alpina. I am not sure if the 7 series uses the same engine. :dunno:
Can someone clarify?

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