2XLXTN

Does anyone have any hard numbers on what the 5 HP increase to the 2018's actually did? It seems like a minimal/arbitrary figure solely for marketing if I were to guess.

I have a 2018 IS350 F-sport. Absolutely love it from top to bottom. I obviously have the extra 5 HP (better watch out at that stoplight...I'll drag your *** to the tune of FIVE EXTRA HORSEPOWER) but out of sheer, morbid curiosity, I'm just wondering what that actually did performance-wise and what their reasoning was behind that?

signdetres

The 2018 has a revised engine. It's using the 2GR-FKS engine whereas the previous years used the 2GR-FSE engine.

heffnerlex

I don't know if it is just me, but shifting (especially when down shifting in manual mode) seems much quicker in the 2018 IS350 when compared to older models. Power wise I really can't feel the difference.

E46CT

Your facelift IS also carries an additional 90 lbs or so over the old one. So that 5 hp increase is negligible. If anything, your car might actually be a tad slower than the pre-facelift.

skiracer

Someone mentioned the 2018 has a slightly higher redline as well. Here's a video of a cold startup of my car. Looks like the redline is around 6800 RPM??

Burrcold

Indeed it jumped from 6600 rpm to 6800 rpm in the 2018's.

2XLXTN

A 5 HP increase is always negligible...which circles us back around to the reason why I posted this to begin with.

E46CT

I only said that cause you were wondering what it does performance wise.

2XLXTN

That's a plausible reason for sure...and it would be very "Toyota" honestly. Only improve when necessary/forced to improve. As well all know, they'll run some old tech into the ground until they just can't justify it anymore. So maybe they just calculated that the 5HP would be enough to offset a 90ish lb weight gain? Fair enough. Makes sense too.

5 HP just seems like such a random/pointless number. It was obviously intentional, but why not give a mid-cycle refresh the power to compete with the other NA V6's out there? GM makes 335/284 out of the V6 they put in the Camaro.

I guess I was looking for hard numbers/specs. No one seems to have really done an in-depth review of the 18's vs the previous models. It would be interesting to know if we did actually lose a split second to the weight increase.

E46CT

I don't see many tests for the 18 IS350 but for reference, here's what happened for the refreshed GS350 vs the pre refresh GS350, despite the power bump. FWIW:

Car and Driver

2013 GS350 RWD
0-60 5.5 sec
0-100 13.7 sec
1/4 mile 14.1 @ 102mph

2016 GS350 RWD
0-60 5.8 sec
0-100 14.2 sec
1/4 mile 14.3 @ 101mph

JDR76

For your GS comparison, note that the 2013 was with the 6 speed and the 2016 was with the 8 speed.

E46CT

Yep. Mostly shows though the 5 hp doesn't do much.

JDR76

No disagreement there. 5hp does nothing noticeable to performance. Though what I think the GS comparison shows is not what the 5 horsepower doesn't do, but rather what the 8 speed doesn't do. But we can save that for another thread.

E46CT

Ok here we go.

Car and Driver
2014 IS350 8 Speed RWD
0-60 5.0sec
1/4 mile 13.6

2018 IS350 8 Speed RWD
0-60 6.0 sec
1/4 mile 14.6


Road and Track
2014 IS350 8 Speed RWD
0-60 5.4 sec
0-100 13.3 sec
1/4 mile 13.9 @ 102mph

E46CT

I suspect with a spare tire, tool kit, first aid kit removed, maybe backseat, some very sticky rubber, the 2014 IS350 can muster up a sub 5 second 0-60 =P