Following the various threads about the G37, one of the largest complaints I found was the heavy weight of this car (near 3700 pounds?). Anyway, I happened to come across the sales brochure from the 1990 Maxima that we owned and noticed that the weight of the SE Sedan was 3153 pounds. Now the Maxima was not a small car and I recall that three people could fit in the back (if need be). The G37 physically seems smaller than my old Maxima so what is it that causes the extra 500 pounds??. Aren't they using lighter materials these days? I can't believe that a few pieces of side impact structure could account for such a massive weight increase.

Doug

 

The majority of the weight is suppose to be due to the doors. They used heavier materials to make it sturdier and to make it safer in side impacts. The new engine probably accounts for some of the weight as well. Take out the spare tire (donut) and tools and you could save about 50Ibs.

 

Well aside from the extra impact structures added to the frame which probably adds a bit, other differences on this car from a 90 Maxima:

1. 3.7L engine
2. Stiffer FM frame (stiffer usually means more welds)
3. larger rims
4. larger rotors brakes
5. driveshaft
6. LSD
7. VDC
8. Technology (Navigation, Hard drive, ICC, Adaptive headlights, Dual Auto Climate control, Bose studio on Wheels, Xenon headlights, Backup Camera etc.)
9. Transmission with more associated technology (usually as added parts).
10. Side impact airbags front, side curtain airbags front and rear
11. Keyless lock and associated sensors
12. ABS (depending on Maxima model)
13. TCS
14. Extra cushioning for all seats with heating capability
15. Larger fuel tank
16. Extra sound deadening material

Just to name a few. When you're comparing to a car from the 90's that weighs 3153 pounts, there are so many refinements and advancements it's a wonder the cars nowadays aren't all 4100+ pounds. This is due to the difference in lighter/stronger materials they use now, as you have mentioned previously, that it still weights at 3700.

 

Yep most cars have gotten very much heavier since the 90s. Go back to the 80s and family sedans often weigh less than sports cars of today.

 

Yep, I would say that just about covers it!

 

Thanks for the input. I guess it really is an accomplishment these days to break below 3500 pounds, even for a small car. I forgot that the Maxima was front-wheel-drive so the driveshaft, rear end, transmission, etc. would have added considerable weight if it would have been rwd.

 

ya cars are getting obease like most americans

 

I wonder how much weight it will save total if you replace the 19" wheel with some light weight forge wheels like the Ray's from the 07's...

I have a feeling Infiniti will do this in later year models..

 

Yeah it covers a lot. It's actually disappointing to me lighter weights can't be achieved.

 

Just curious -- buy why would the 3.7 be heavier? Isn't it based on the same block (just a bit bored and stroked)? Are the heads heavier?

My question is how is it 150# heavier than the sedan? I can't imagine the engine and brakes/wheels can account for that -- can it?

 

Just lose some weight fat people shouldnt drive sports car anyways. Thats why they make suv. Its only like 100 pounds heavier than the sedan not sure just think of Paris hilton in your car when your driving it minus the dog.

 

If weights a issue just wait for the Z with the 3.7.I assume that should be at least 100+lbs lighter.
Less tech features,backseat and other creature comforts makes you wonder what kind of beast it could be.

 

I HIGHLY doubt that 0.2 liters of displacement & 1 inch bigger rotors would add 200 lbs of weight. The VQ35HR & VQ37VHR are basically identical with the exception of VVEL, 0.2 displacement, and 0.6 compression difference.

If anything, its in its structural design or chasis (wider stance).

Infiniti really looked into refinement when designing the G37; alot of that, including all the goodies in its interior/technology, also most likely contributed to the added weight.

Sedans have always been slightly lighther to the coupe; in the first generation G35's, it was nothing significant. They both performed alike even with the same engine.

But in this new second generation, the difference in weight is big enough for Infiniti to have to add 26 more HP in order to "compromise" for the added weight as compared to the sedan. IMO, Infiniti did a big mistake by making the Coupe as heavy as 3700. The 07 sedan is ok in regards to weight... the G37 coupe isn't

.

 

Does anyone know if the 3700+ weight listed includes fuel? The coupe has 20gallon tank which is huge for a car of that size! the 335 only is about 15 gallons... Running with half a tank would save about 65lbs...

 

I agree the new engine won't add that kind of weight and also that the coupe is pretty porky. I was having this discussion over on my350. I don't think Rampant is suggesting the new 3.7 weighs 200 pounds more though.

The car is much stiffer so bracing etc is adding weight, additional sound insulation no doubt as well as the bigger engine and additional luxury features. A few pounds here and there all adds up. Just like that extra pop or cookie each day!