2015 5.0 Ultimate vs 2013 5.0 Rspec performance

[drpearso]

I've driven the 2015 5.0 Ultimate. Most of the features are the same as the 2013 Rspec with a major exception being the much better seats in the 2015. The stereo on both are 17 speaker Lexicons. They should sound the same (2015 has 900 watts), but the Rspec seems clearer and sharper, but maybe the 2015 needs more time to compare.

My primary question to the forum members is performance between the two. After test driving the 2015 5.0 in different drive modes, then getting back in my Rspec, the Rspec 'seems' to accelerate faster. What do others think about performance between the Rspec & 2015 5.0 after they've driven both?

My sole interest in the 2015 are the great seats they have. The wood, and HUD are very nice, and the driving mode selector is also nice. Regards.

 

[ksoze]

My primary question to the forum members is performance between the two. After test driving the 2015 5.0 in different drive modes, then getting back in my Rspec, the Rspec 'seems' to accelerate faster. What do others think about performance between the Rspec & 2015 5.0 after they've driven both?

Put three people in the 2013 and it will feel more like the 2015 feels with just the driver. It's all about the weight.

 

[drpearso]

Put three people in the 2013 and it will feel more like the 2015 feels with just the driver. It's all about the weight.

ksoze -- so 2015 5.0 is approx 450 pounds heavier than 2013 Rspec?

 

[vega]

the sound from the audio system likely sounds different because the interior has changed, the trunk is smaller, and it looks like the door speakers have been changed. It was the 1st thing I noticed.

as for the performance, here all the Genesis line are AWD. the 3.8 lost 22+ hp for some reason, and the 5.0 is now 420hp. vs 429hp for the 2013.
I cannot comment on the new vs old V8 as I do not own one, but the 6cyl in the 2015 with AWD feels anemic both from a dead stop and once moving, compared to my 2010.

I'd guess the AWD adds 120+ pounds of weight. Gearing is probably different. But the difference is night and day with the 3.8 for sure.

 

[Seattle Genesis]

I just purchased a giant concrete bird bath and put it in the trunk and drove it home. The ride difference was remarkable. It really made a nice smoother ride so I can see how the 2015 with its added weight and better suspension would be better.

 

[TOMMYJR9]

I always keep a full tank of gas because it makes the car ride quieter and smoother.

 

[ksoze]

ksoze -- so 2015 5.0 is approx 450 pounds heavier than 2013 Rspec?

Over 300 pounds heavier.

 

[akuma]

i'm trying to figure out where the extra 300 lbs comes from. the base 2015 3.8 is only about 100 lbs heavier than the base 2014 3.8 despite having more equipment, sound insulation, etc. so that leaves 200 lbs unaccounted for when comparing a fully loaded Rspec and a fully loaded ultimate 5.0. maybe the panoramic moonroof and the adjustable suspension add about 150 lbs (I'm just speculating). does the Rspec have a staggered wheel/tire setup? the bigger rear tires/wheels (if they're bigger) might add a little weight as well. the second ventilated seat and additional power settings on the passenger seat? the power trunk? there might be additional or heavier safety hardware with the fancier cruise and lane assist, CO2 monitor as well as the HUD. maybe the real wood is heavier than the plastic (but doesn't the Rspec have real wood?). different size spare tire? besides that, I have no idea.

 

[Mark_888]

i'm trying to figure out where the extra 300 lbs comes from. the base 2015 3.8 is only about 100 lbs heavier than the base 2014 3.8 despite having more equipment, sound insulation, etc. so that leaves 200 lbs unaccounted for when comparing a fully loaded Rspec and a fully loaded ultimate 5.0. maybe the panoramic moonroof and the adjustable suspension add about 150 lbs (I'm just speculating). does the Rspec have a staggered wheel/tire setup? the bigger rear tires/wheels (if they're bigger) might add a little weight as well. the second ventilated seat and additional power settings on the passenger seat? the power trunk? there might be additional or heavier safety hardware with the fancier cruise and lane assist, CO2 monitor as well as the HUD. maybe the real wood is heavier than the plastic (but doesn't the Rspec have real wood?).

• different size spare tire? besides that, I have no idea.

• R-Spec does not have staggered wheels. They are all the same size.
• 2015 rear wheels are definitely larger than R-Spec, not sure about fronts
• I thought that Rspec has leather insert on front of dash (not 100% sure), and plastic wood elsewhere, but doesn't seem like that could account for any difference in weight (the 2015 wood is a veneer and not solid wood).
• Spare tire might be larger, since at least the rear wheels are larger on the 2015. I believe that Rpec has space-saving spare, not sure if 2015 is a full size spare.

 

[ksoze]

i'm trying to figure out where the extra 300 lbs comes from.

This has been debated in previous threads here. Still a mystery where all the additional weight came from and where it can be shed in a potential future performance model. Just beefing up the HP is not going to negate that heft.

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[Mark_888]

Some of the additional weight (maybe most of it) on the 2015 compared to RSpec can probably be attributed to the following, and cannot be removed:

"An all-new platform utilizes advanced-high-strength steel forged in Hyundai’s own steel mill giving the Genesis improved rigidity and overall stiffness. The All-New Genesis was designed to be the strongest and safest body structure in its class, providing both exceptional dynamics and unprecedented occupant protection."​

 

[ksoze]

Some of the additional weight (maybe most of it) on the 2015 compared to RSpec can probably be attributed to the following, and cannot be removed:

"An all-new platform utilizes advanced-high-strength steel forged in Hyundai’s own steel mill giving the Genesis improved rigidity and overall stiffness. The All-New Genesis was designed to be the strongest and safest body structure in its class, providing both exceptional dynamics and unprecedented occupant protection."​

The V6 has the same steel and did not have the same weight gain as the V8.

 

[Mark_888]

The V6 has the same steel and did not have the same weight gain as the V8.

Maybe we need some weight numbers here for all trim levels, and 2014 vs 2015. I think the 2015 V6 is definitely heavier than the 2014 V6.

Obviously, the V8 engine is about 200 lbs heavier than the V6. Then there are bigger front disks to make up for the added weight of the engine. Maybe the V8 has more structural support since the extra weight of the engine puts more stress on the front frame, etc. Also, as others have pointed out, the adjustable suspension probably adds a fair amount of weight.

 

[gameday22]

Approximately 85lbs of it is just added insulation throughout the car, then factor in the additional steel, electronics, bigger wheels/rims, brakes, suspension changes, engine, increase in length (small difference but adds weight somewhere) and it all adds up quickly.


2015 Alloy Wheels: Front 19-in. X 8.5-in. / Rear 19-in. X 9-in.
P245/40VR19 / P275/35VR19

2014 Alloy Wheels: Front 19-in. X 8-in. / Rear 19-in. X 8-in.
P235/45VR19


I don't mind the car being somewhat heavier, it does feel more solid all the way around and definitely rides better. Once again though they aren't targeting the sports sedan segment, unless they come out with an RSpec version...in that case the car definitely needs to shed some weight while not sacrificing comfort and performance. Until that time the comparison to cars like the CTS-V Sport etc. isn't appropriate.

 

[ksoze]

Approximately 85lbs of it is just added insulation throughout the car, then factor in the additional steel, electronics, bigger wheels/rims, brakes, suspension changes, engine, increase in length (small difference but adds weight somewhere) and it all adds up quickly.

The point is the V6 got many of the same changes and did not have the same proportional weight gain. The engine weight should be the same as last year - the changes were mostly mapping.

 

[Midnightsun]

The point is the V6 got many of the same changes and did not have the same proportional weight gain. The engine weight should be the same as last year - the changes were mostly mapping.

Which weight are they using, AWD or RWD? If I take the Canadian figures it shows a weight of 1948kg or 4286 lbs and we do not get RWD up here. On the US site the weight is listed at 4138 lbs but they do not differentiate in the and assume this is for the RWD.

Interestingly enough, the Canadian specs show a difference of 326lbs for the V6 vs the V8 and these are both AWD versions.

Canada V8 AWD is shown at 2126kg or 4677lbs vs 4588 for the RWD in The US

As The V8 this year has some really massive rubber in back so this is definitely more weight. As for the rest the CDC suspension and probably a few other little trinkets here and there.

Or they messed up their figures and do not know themselves.

Our $55,700 Genesis V-8 weighed in at 4588 pounds, far more than the 4199-pound 2012 Genesis R-Spec we've tested with the same engine. The new Genesis is a more substantial car, and the weight has a predictable effect at the track. Acceleration from 0 to 60 mph comes in 5.2 seconds, up from that last-gen Genesis' 4.8-second time.

Read more: http://www.motortrend.com/roadtests/sedans/1404_2015_hyundai_genesis_v8_first_test/#ixzz33OmFj1G0

 

[Mark_888]

Interestingly enough, the Canadian specs show a difference of 326lbs for the V6 vs the V8 and these are both AWD versions.

In previous years, the V8 was about 200 lbs heavier. So that means there is about 126 lbs to account for. The 2015 V8 has heavier rims/tires, larger/heavier brakes, and heavier suspension components (especially if it is the one with Variable suspension) and possibly some extra bracing up front to support the heavier engine.

The only way they can take any meaningful amount of weight off an R-Spec version is use something like a 3.3 V6 Turbo. But I don't think Hyundai really is all that interested in the RSpec sedan segment anymore, and they are working on a new RSpec coupe for enthusiasts.

 

[Midnightsun]

In previous years, the V8 was about 200 lbs heavier. So that means there is about 126 lbs to account for. The 2015 V8 has heavier rims/tires, larger/heavier brakes, and heavier suspension components (especially if it is the one with Variable suspension) and possibly some extra bracing up front to support the heavier engine.

The only way they can take any meaningful amount of weight off an R-Spec version is use something like a 3.3 V6 Turbo. But I don't think Hyundai really is all that interested in the RSpec sedan segment anymore, and they are working on a new RSpec coupe for enthusiasts.

It is since we only get AWD Ultimate up here which has the variable suspension.

 

[ksoze]

To summarize this weight changes:

• The 2014 V8 and V6 models had a 221 lbs difference.
• The 2015 V8 and V6 (RWD) models now have a 403 lbs difference
• The V6 version gained 119 lbs from 2014 to 2015.
• The V8 version gained 301 lbs from 2014 to 2015

So....the 2015 V8 specific features have added 182 lbs of extra weight above what the 2015 V6 added from 2014 to 2015. This weight does NOT include new HS steel, sound insulation, electronics, body changes, etc, which are the same on both 2015 cars. Engine weight should not have changed on either as the changes were mostly mapping.

 

[Mark_888]

To summarize this weight changes:

• The 2014 V8 and V6 models had a 221 lbs difference.
• The 2015 V8 and V6 (RWD) models now have a 301 lbs difference
• The V6 version gained 119 lbs from 2014 to 2015.
• The V8 version gained 301 lbs from 2014 to 2015

So....the 2015 V8 specific features have added 182 lbs of extra weight above what the 2015 V6 added from 2014 to 2015. This weight does NOT include new HS steel, sound insulation, electronics, body changes, etc, which are the same on both 2015 cars. Engine weight should not have changed on either as the changes were mostly mapping.

Maybe I am missing something. Based on the first two items, the 2015 V8 has gained 80 additional pounds compared to the 2015 V6 (since there is a 221 lb difference in the engine alone). Possible explanations of the 80 lbs are:

• Wider rims and tires on the V8 (both front and rear, but especially rear). Not only are the V8 rims wider they appear to be beefier.
• Larger brakes on the V8.
• Heavier suspension parts in the V8.
• Misc items related to extra electronic features.