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Nissan eventually plans to phase out the V6 for a turbocharged four-banger

Looming EPA regulations have resulted in big changes in the automotive world. We've seen a number of V8 engines give way to turbocharged V6s, while V6 engines in midsize sedans are being tossed or replaced with turbocharged inline-4s.
 
We're also on the cusp of seeing huge weight reductions for iconic automotive nameplates. The Ford is reportedly eyeing a 700-pound weight reduction for the next generation F-150 and a 400-pound weight reduction for the next Mustang.
 
According to a new report from Motor Trend, another fan favorite is going on a diet all in the name of performance and fuel economy concerns. The next generation Nissan Z (codenamed Z35) will lose two inches in width and a whopping 400+ pounds. The huge weight reduction would put the next generation Z below 2,900 pounds.


2013 Nissan 370Z
 
Motor Trend's sources indicate that while Nissan plans to offer the next generation Z with a V6 when it launches, the "master plan" is to phase out the V6 entirely in favor of a turbocharged, 2.5-liter inline-4. The turbo four will reportedly pump out 330hp, putting it on par with the 3.7-liter V6 used in the current 370Z.
 
The weight reduction and move to four-cylinder power should allow the new Z to achieve EPA numbers far better than the current car’s 18/26 mpg (city/highway) with a manual transmission.

Source: Motor Trend



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By Sivar on 8/27/2013 4:43:54 PM , Rating: 2
You can't compare displacement of overhead cam engines to pushrod engines (Corvette).
Your point is still interesting, though.


By freedom4556 on 8/27/2013 5:50:54 PM , Rating: 2
Why the hell can't he? What does the actuation mechanism for the valves have to do with the swept volume of the cylinders? Mind boggling!


By Alexvrb on 8/28/2013 1:10:24 AM , Rating: 3
Well, displacement isn't important by itself. Otherwise you get these idiots that think that having a 300HP 2.0L is somehow automatically "better" or "more efficient" than a bigger engine with the same output - even though this isn't necessarily true!

DOHC engines tend to have higher output at the same displacement, so he is partially correct - it's silly to compare apples to apples using displacement numbers like that's supposed to mean anything. Especially given that OHV "V" engines are physically more compact than their DOHC brethren and thus very power dense.

So really, engine output (HP, Torque, and the associated curves) and actual real-world efficiency is what really matters. With that being said... the 6.2L LS3 (and new LT1) is a good example of how you can get good mileage AND power out of a naturally aspirated pushrod V8. The new 5.3L (LT1-derived) in their 2014 trucks is also similarly powerful and efficent. Oh, and they also build turbo L4 and V6 engines, so it's not like they're adverse either route.


By Samus on 8/28/2013 3:34:54 AM , Rating: 2
I agree with his point, as well. Why does Nissan's 3.7L V6 only get 26MPG Highway in such a slender vehicle?

Our 2012 Escape with a 240HP V6 does better than that, and it's a box on wheels. The engine is also a remnant of the 90's, still using coilpack ignition, MPFI, fixed cam gears and fixed intake runners. It isn't the epitome of efficiency.


By FITCamaro on 8/28/2013 10:01:30 AM , Rating: 2
The Corvette is both lighter and has lower highway gear ratios. The Nissan weighs more and is geared higher for better acceleration. Simple as that.


By 91TTZ on 8/28/2013 5:19:23 PM , Rating: 3
Part of the benefit to using a large displacement engine is that you can produce your torque down lower. When cruising at highway speeds RPM because one of the main factors in fuel consumption. If you can cruise at 1600 rpm instead of 3000 RPM that's a pretty big difference in fuel economy.

When you graph out the different factors in engine efficiency you see that some things increase linearly while some things square with speed.


By Skywalker123 on 8/30/2013 3:43:57 PM , Rating: 2
The only replacement for cubic inches is cubic money.


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