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Infiniti will turn to turbocharged 4- and 6-cylinder engines, hybrids, full electrics

"And another one gone, and another one gone / Another one bites the dust"
Well, it looks as though the recently approved CAFE standards that aim to increase automobile fuel economy to 54.5mpg by 2025 have claimed another victim. Infiniti currently has V8 engine options available in its M luxury sedan, FX crossover, and QX sport utility vehicles, but that likely won't be the case in future iterations of those vehicles.
According to a report by AutoGuide, increasingly stringent fuel economy and emissions regulations mean that V8 engines are no longer on the table for Infiniti vehicles. V8 engines have traditionally been available in luxury vehicles as a symbol of prestige and power, but Infiniti will look to new ways to bring powerful engines to its lineup while still keeping fuel economy in check.
“I don’t think any car that is on Infiniti drawing boards from here onwards we should expect a V8 to be included in that plan,” Johan de Nysschen, Infiniti's global president.
Infiniti's 5.0-liter V8 produces 385hp, its 5.5-liter V8 produces 420hp, and its 5.6-liter V8 (truck-based) produces 400hp.

Infiniti to say good-bye to V8 engines
There are numerous directions that Infiniti can take with the absence of a V8 engine. Automakers like Ford already have twin-turbocharged V6 engines that develop 365hp while still delivering respectable fuel economy. Even Hyundai is rumored to be getting in on the action with a twin-turbocharged 3.3-liter V6 which generates 395hp.
For entry-level and mid-range models will also see a shift in available engines as well. Infiniti's current workhorse engine is the 3.7-liter “VQ” V6, but Nissan is also working on a turbocharged four-cylinder engine to deliver comparable power and vastly improved fuel economy.
Other options for Infiniti include fully electric vehicles (like the LE Concept) and additional hybrid models (we’re hoping that Infiniti delivers a production version of the Emerg-E).
Infiniti isn't the only luxury maker to drop a V8 engine from its lineup. When Lexus redesigned its mid-range GS sedan, it dropped the 4.6-liter V8 engine option and instead launched the vehicle with a 3.5-liter V6 and a 3.5-liter V6/performance hybrid model for those that want the power of a V8.

Source: AutoGuide

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What's the point of doing this?
By 91TTZ on 9/4/2012 3:00:16 PM , Rating: 2
I see a lot of these articles stating that V8s are gas hogs and how much more efficient a smaller turbocharged engine is. However, that isn't really the case.

As I pointed out in another post, the power that the engine produces is usually what dictates fuel economy given the same vehicle type. My 300ZX TT with its 3.0L V6 gets roughly the same fuel economy as a much newer 350Z with 3.5L V6 that makes the same power. The Corvette with a 5.7L V8 is able to produce more power and torque and still get about the same fuel economy.

This article is about Infinity, so I'll compare a couple of their luxury cars:

Let's compare a 2005 Q45 with 340 HP 4.5L V8 to a G35 with a 298 HP 3.5L V6

Q45: 16/18/22 mpg:
G35: 16/18/22 mpg:

You'll see that they get about the same fuel economy. Going with a smaller engine didn't really produce better fuel economy, and adding turbochargers to it certain won't increase fuel economy since they'd need to lower the compression ratio which decreases efficiency.

I don't know why they're canceling development of V8s, but I don't think that the reason is the CAFE regulations.

Also, the author used Hyundai as an example of companies going with smaller engines to get better fuel economy, but that car is obviously not going to get very good fuel economy producing that kind of power and being AWD. For that kind of performance they could have probably used a large V8 and got better fuel economy. It probably has more to do with development costs and having multiple engines to develop and less to do with fuel economy.

RE: What's the point of doing this?
By Jeffk464 on 9/4/2012 2:40:45 PM , Rating: 2
Again look at BMW's numbers, great power great mileage.

RE: What's the point of doing this?
By 91TTZ on 9/4/2012 3:42:58 PM , Rating: 2
I think the recent bump in fuel efficiency on BMW's engines has to do with the fact that automakers have been recently switching to direct injection on their engines. This increases power and fuel economy.

Even new engines from Ford and Chevy use this. As an example, the low-end Camaro with a V6 engine makes 312 HP and gets 19/30 mpg.

RE: What's the point of doing this?
By Jeffk464 on 9/4/2012 4:37:30 PM , Rating: 2
I agree 100% the two most recent boosts were from direct injection and auto transmissions with 5 or more gears.

Before that the main boosts were from variable valve timing and clutch like dohicky that locks out your torque converter when not swapping gears.

But it would probably be smart to turn the efficiency benefits into smaller engines. Instead of making a 300HP V6 midsize family sedan, the improvements allow you to put a 4 cylinder in the same car and have the power of a V6 sedan from ten years ago. Do we really need a Toyota Camry that will ditch a lot of sports cars from ten years ago?

By Jeffk464 on 9/4/2012 4:42:35 PM , Rating: 2
I talked my mom into buying a 4cyl Accord instead of a V6 and guarantee she doesn't know the difference until she pulls up to the gas pump.

RE: What's the point of doing this?
By 91TTZ on 9/4/2012 5:30:17 PM , Rating: 2
Do we really need a Toyota Camry that will ditch a lot of sports cars from ten years ago?

LOL- no we don't... but you know it's coming.

RE: What's the point of doing this?
By Spuke on 9/4/2012 6:14:04 PM , Rating: 2
But it would probably be smart to turn the efficiency benefits into smaller engines.
DI and other tech is already used in smaller engines.

"A politician stumbles over himself... Then they pick it out. They edit it. He runs the clip, and then he makes a funny face, and the whole audience has a Pavlovian response." -- Joe Scarborough on John Stewart over Jim Cramer

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