E89 20i engine versions

[brawnyblue]

I read there are two versions of the 20i engine in the E89 (N20B20). Both seem to have the same output, but one goes from 0-100 in 6.6s and one takes 6.9s. Does this sound correct?

Does anyone have any more info?

[Maniac]

I've not read that anywhere, must have missed it. Where have you seen this information? To my knowledge there's just the N20 in 18i/20i/28i forms but they're supposed to be the same engine. There's an N26, which is a super low emissions version of the N20 for the US and other territories that demand it.

http://en.wikipedia.org/wiki/BMW_N20

[brawnyblue]

I've not read that anywhere, must have missed it. Where have you seen this information? To my knowledge there's just the N20 in 18i/20i/28i forms but they're supposed to be the same engine.

Wikipedia, thus I am doubtful! 18i, 20i and 28i are all based on the N20B20 but differently tuned.

[Maniac]

On the link I posted for wikipedia it shows the N20 2.0 as well as the 1.6.. is it this one you're referring to?

[brawnyblue]

On the link I posted for wikipedia it shows the N20 2.0 as well as the 1.6.. is it this one you're referring to?

It's on the link for the E89, not the N20B20. It could be down to transmission though, article is not clear!

Here, scroll down to engines: http://en.wikipedia.org/wiki/BMW_Z4_%28E89%29

Pre-LCI Engine Information
Years Weight Engine Alignment CC Charge Power Torque Top Speed 0-60
*20i 2011-PR 1420kg (3131lbs) N20B20 I4 1997cc Turbocharged 135kW/184PS/181hp@5000-6250 270Nm(199ft-lb)@1250-4500 142mph (232kmh) 6.9s
*20i 2011-PR 1395kg (3075lbs) N20B20 I4 1997cc Turbocharged 135kW/184PS/181hp@5000-6250 270Nm(199ft-lb)@1250-4500 142mph (228kmh) 6.6s
*23i 2009-11 1430kg (3153lbs) N52B25 I6 2497cc Naturally Aspirated 150kW/204PS/201hp@6400 250Nm(184ft-lb)@2750 149mph (239kmh) 7.0s
*23i 2009-11 1405kg (3097 lbs) N52B25 I6 2497cc Naturally Aspirated 150kW/204PS/201hp@6400 250Nm (184ft-lb)@2750 150mph (242kmh) 6.3s
28i 2011-PR 1420kg (3131lbs) N20B20 I4 1997cc Turbocharged 180kW/245PS/241hp@5000-6500 350Nm (258ft-lb)@1250-4800 155mph (250kmh) 5.5s
28i 2011-PR 1400kg (3086lbs) N20B20 I4 1997cc Turbocharged 180kW/245PS/241hp@5000-6500 350Nm (258ft-lb)@1250-4800 155mph (250kmh) 5.5s
30i 2009-11 1430kg (3153lbs) N52B30 I6 2996cc Naturally Aspirated 190kW/258PS/255hp@6600 310Nm (229ft-lb)@2600 155mph (250kmh) 5.9s
30i 2009-11 1415kg (3119lbs) N52B30 I6 2996cc Naturally Aspirated 190kW/258PS/255hp@6600 310Nm (229ft-lb))@2600 155mph (250kmh) 5.6s
35i 2009-PR 1525kg (3362lbs) N54B30 I6 2979cc 2 Turbochargers 225kW/306PS/302hp@5800 400Nm (295ft-lb)@1300-5000 155mph (250kmh) 4.9s
35i 2009-PR 1505kg (3318lbs) N54B30 I6 2979cc 2 Turbochargers 225kW/306PS/302hp@5800 400Nm (295ft-lb)@1300-5000 155mph (250kmh) 5.0s
35is 2010-PR 1525kg (3362lbs) N54B30TO I6 2979cc 2 Turbochargers 250kW/340PS/335hp@5800 450Nm (332ft-lb)@1400-4500 155mph (250kmh) 4.6s
LCI Engine Information
Years Weight Engine Alignment CC Charge Power Torque Top Speed 0-60
*18i 2013-PR 1420kg (3131lbs) N20B20 I4 1997cc Turbocharged 115kW/156PS/154hp@5000 240Nm (177ft-lb)@1250-4400 137mph (220km) 7.8s
*18i 2013-PR 1395kg (3075lbs) N20B20 I4 1997cc Turbocharged 115kW/156PS/154hp@5000 240Nm (177ft-lb)@1250-4400 137mph (220kmh) 7.6s
*20i 2011-PR 1420kg (3131lbs) N20B20 I4 1997cc Turbocharged 135kW/184PS/181hp@5000-6250 270Nm(199ft-lb)@1250-4500 142mph (232kmh) 6.6s
*20i 2011-PR 1395kg (3075lbs) N20B20 I4 1997cc Turbocharged 135kW/184PS/181hp@5000-6250 270Nm(199ft-lb)@1250-4500 142mph (228kmh) 6.6s
28i 2011-PR 1420kg (3131lbs) N20B20 I4 1997cc Turbocharged 180kW/245PS/241hp@5000-6500 350Nm (258ft-lb)@1250-4800 155mph (250kmh) 5.3s
28i 2011-PR 1400kg (3086lbs) N20B20 I4 1997cc Turbocharged 180kW/245PS/241hp@5000-6500 350Nm (258ft-lb)@1250-4800 155mph (250kmh) 5.5s
35i 2009-PR 1525kg (3362lbs) N54B30 I6 2979cc 2 Turbochargers 225kW/306PS/302hp@5800 400Nm (295ft-lb)@1300-5000 155mph (250kmh) 4.9s
35i 2009-PR 1505kg (3318lbs) N54B30 I6 2979cc 2 Turbochargers 225kW/306PS/302hp@5800 400Nm (295ft-lb)@1300-5000 155mph (250kmh) 5.2s
35is 2010-PR 1525kg (3362lbs) N54B30TO I6 2979cc 2 Turbochargers 250kW/340PS/335hp@5800 450Nm (332ft-lb)@1400-4500 155mph (250kmh) 4.6

[techathy]

Auto v's manual gearbox.

[Maniac]

Ah now I see the list, yes auto vs manual times, not a different engine.

[TitanTim]

Just the same engine in different states of tune and one of the worst I've had the pleasure to own

Tim.

[brawnyblue]

Ah now I see the list, yes auto vs manual times, not a different engine.

That explains it!

Just the same engine in different states of tune and one of the worst I've had the pleasure to own

Tim.

Why do you dislike it so much? I have had two six pots, one M54B25 and a N52B25, both 2.5i and I would take the N20B20 again any day. Better performance, economy and torque curve.

Only thing I don't like this far is the fuel economy. It's not bad but much worse than expected. I have been getting around 30mpg with mixed driving and around 20 mpg with town driving which seems really high. I have not managed to get above 35mpg, even just trotting along on the highway. I wonder if something needs checking out

[RedLine]

Only thing I don't like this far is the fuel economy. It's not bad but much worse than expected. I have been getting around 30mpg with mixed driving and around 20 mpg with town driving which seems really high. I have not managed to get above 35mpg, even just trotting along on the highway. I wonder if something needs checking out

Am getting 35mpg easily and much nearer 40mpg out of our 20iMSport and thats with a solid right foot on occasions. Driving is mainly country and fast roads and little stop/start town driving. Most journeys allow the engine to get properly warmed up so that may make a difference. It does take 7-8 miles before the oil is up to running temperature. It doesn't get revved until its hot. I've noticed quite larger differences in fuel from different outlets in the diesels we run getting as much a 5mpg swings on occasions with the same mileage and journeys - I wonder if petrol has the same variance. Have you tried fuel from different petrol stations?

Not owned a 3l 6-pot (yet) and the last 6 cylinder car was a 3L V6 quite a few years ago. That was a much larger car and a motorway easter as well a nice drive around town. The 20i doesn't have the low end grunt of a six even in Sport but still fun above 3k revs. Can image if you've had a 6 cylinder version you'd not want to go back, but, the 4 pots is more than adequate if you want a GT rather than an outright sports car. It suits us (until I drive a 6-pot that is).

[TitanTim]

Ah now I see the list, yes auto vs manual times, not a different engine.

That explains it!

Just the same engine in different states of tune and one of the worst I've had the pleasure to own

Tim.

Why do you dislike it so much? I have had two six pots, one M54B25 and a N52B25, both 2.5i and I would take the N20B20 again any day. Better performance, economy and torque curve.

Only thing I don't like this far is the fuel economy. It's not bad but much worse than expected. I have been getting around 30mpg with mixed driving and around 20 mpg with town driving which seems really high. I have not managed to get above 35mpg, even just trotting along on the highway. I wonder if something needs checking out

I think mine wasn't a great example, whined awfully when cold and accompanied with a diesel sounding rat tat tat. I asked the dealer to compare it with others which weren't that much better. It improved once warmed up but hated cold starts. Mine used to do 23mpg urban. My M135i does 18mpg

Mpg should improve with mileage, short trips in winter will kill fuel consumption.

Tim.