# Infiniti VC-T: Variable Compression Ratio Engines
**URL:** https://forums.speedlife.net/t/infiniti-vc-t-variable-compression-ratio-engines/274167
**Category:** NYSpeed Automotive
**Created:** [August 15, 2016, 1:23pm UTC](https://forums.speedlife.net/t/infiniti-vc-t-variable-compression-ratio-engines/274167 "2016-08-15T13:23:49Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Onyx\_Z32](https://forums.speedlife.net/u/Onyx_Z32)
#### Post date: [August 15, 2016, 1:23pm UTC](https://forums.speedlife.net/t/infiniti-vc-t-variable-compression-ratio-engines/274167/1 "2016-08-15T13:23:49Z")
Interesting stuff, supposed to be in the production QX50:
> The result of all this is an engine that gets 27 percent better fuel economy than Nissan’s 3.5-liter V6, at roughly the same HP and torque. According to Reuters, at a press conference Nissan engineers said the new engine matches turbodiesels in torque, and is actually cheaper to build than modern turbodiesel engines.
>
> The engine will be officially revealed on September 29 at the Paris Motor Show.
> The ingenuity of VC-T engine technology lies in its ability to transform itself and seamlessly raise or lower the height the pistons reach. As a consequence, the displacement of the engine changes and the compression ratio can vary anywhere between 8:1 (for high performance) and 14:1 (for high efficiency). The sophisticated engine control logic automatically applies the optimum ratio, depending on what the driving situation demands.
> **[The World's-First Variable Compression Ratio Engine Could Kill Diesel Forever](https://jalopnik.com/worlds-first-variable-compression-ratio-engine-could-ki-1785295848)**
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> A gasoline piston engine that can dynamically change its compression ratio —that is, the amount by which the piston squeezes the fuel-air mixture in the cylinder—has long been a holy grail of engine design. It looks like Nissan is the Indiana Jones...
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### Author:  [@XwalkerX](https://forums.speedlife.net/u/XwalkerX)
#### Post date: [August 15, 2016, 2:17pm UTC](https://forums.speedlife.net/t/infiniti-vc-t-variable-compression-ratio-engines/274167/2 "2016-08-15T14:17:49Z")
this kind of blew my mind when I saw mike post it this morning…
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### Author:  [@Onyx\_Z32](https://forums.speedlife.net/u/Onyx_Z32)
#### Post date: [August 15, 2016, 2:21pm UTC](https://forums.speedlife.net/t/infiniti-vc-t-variable-compression-ratio-engines/274167/3 "2016-08-15T14:21:27Z")
> [@XwalkerX](#):
>
> this kind of blew my mind when I saw mike post it this morning…
Where? :gotme:
I just looked and didn’t see anything?
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### Author:  [@XwalkerX](https://forums.speedlife.net/u/XwalkerX)
#### Post date: [August 15, 2016, 2:27pm UTC](https://forums.speedlife.net/t/infiniti-vc-t-variable-compression-ratio-engines/274167/4 "2016-08-15T14:27:55Z")
no lol on FB
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- Updated - - -
I actually wasn’t being sarcastic
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### Author:  [@1QIKZ](https://forums.speedlife.net/u/1QIKZ)
#### Post date: [August 15, 2016, 4:11pm UTC](https://forums.speedlife.net/t/infiniti-vc-t-variable-compression-ratio-engines/274167/5 "2016-08-15T16:11:47Z")
Assume you’d still have to run premium fuel.
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### Author:  [@Onyx\_Z32](https://forums.speedlife.net/u/Onyx_Z32)
#### Post date: [August 15, 2016, 7:16pm UTC](https://forums.speedlife.net/t/infiniti-vc-t-variable-compression-ratio-engines/274167/6 "2016-08-15T19:16:28Z")
> [@XwalkerX](#):
>
> I actually wasn’t being sarcastic
Ohhhh, lol.
> [@1QIKZ](#):
>
> Assume you’d still have to run premium fuel.
We’ll find out more in September but I’d think that’s a good guess.