If we put aside the obvious difference in the body style, what are the other differences between a maxed out sedan and a coupe? Here is what I could figure out:

1. Sedan does not have bi-xenon headlight (both, lowbeam and highbeam, HIDs)
2. Sedan gets less supportive front seats
3. Sedan may come with a full-size spare
4. Both trims come in slightly different color sets

Did I miss anything?

 

Bi-Xenons are only on the 06 coupe.
I don't know about the cars when fully loaded, but in base form the sedan weighs less than the coupe, except for the G35X.
Coupe:
AT- 3,505 lb
6MT- 3,524 lb
Sedan:
AT- 3,468 lb
6MT- 3,512 lb
AWD- 3,650 lb
The sedan also has a hair bit better weight distribution:
Coupe: 54/46 percent (front/rear)
Sedan: 53/47 percent (front/rear)
CD is also a hair better on the sedan:
Coupe: 0.29 (0.28 with Aero Package)
Sedan: 0.27 (0.26 with Aero Package)

All specs are from the infiniti website for the 06 models.

 

You can get a full-size spare with the sedan.
The sedans were never offered with Brembo's

 

Less aftermarket support for the sedans...

 

The coupe comes with 19s while the sedan 18s or at least it was in the past model. Different spring rates too for both cars and the coupe tires are staggered.

 

The weight difference isn't such a shock (afterall, we're talking less than a potential maximum of 60lbs lighter for the given sedan over the given coupe), but the sedan having a better CD than the coupe is.

 

i had a sedna just got the coupe 2 weeks ago...and the susp in the coupe is much tighter then the sedan and the handling i find is btr with the front seats it just plantes u...also the touq...is btr in the coupe..put u right in ur seat


just me 2 cents

 

coupe you can fold down the backseats, sedans only have a pass through

sedans have in the premium pkg backseats are reclinable

sedans only come w/ 18s on sport package while coupe has 18" performance pkg wheels and 19" upgrades

Rear active steer available on coupes

6mt sedans and ALL coupes DO NOT get convenience of assisted exit/entry where the steering wheel moves up and seat slides back when you get in/out of the car.

also sedans in automatic premium have the rear center vents for the rear passengers, all coupes and 6mt sedans do not offer that

 

Did the sedan have sport suspension? My 03 sedan is much tighter than the 2006 G35X loaner I had the other day.

 

Absolutely, less support for the sedan.

 

There is a considerable difference between how the two feel. The ride is a little on the harsh side on the coupe and the tire stagger makes the coupe feel differently. The tires on the coupe are also significantly better so the limits are much higher. This is all stock of course and you can basically make the sedan handle pretty much the same as a coupe (although I bet the center of gravity will still be a little higher on the sedan).

 

G35x does not come available w/ sport tuned suspension..... only rwd sedans can

 

I'm not suprised that the sedan has a marginally better COD than the coupe. The sedan started out as a concept car designed from the ground up. The coupe basically was designed from the 350Z which was designed from the sedan platform.

 

I agree with everyones input on this thread.

 

the sedan is more of a volume car than that coupe so the price will be marginally lower. and don't forget all cars were build on the same platform so it technically the coupe wasn't built right off a 350z design -- there' s a lot more to it