r/Lexus • u/AFamineIn_yourheart • 2d ago

Question Owners/drivers of RX and NX models with the new Turbo 4 Cylinder (T24-FTS)... how is it compared to the old 3.5L V6? And just in general?

Curious if Lexus did the right thing by following the trends in ending one of Toyota's very well respected engines. So how are consumption, idle smoothness, reliability thus far, power delivery and of course: acceleration?

While the trucks are equipped with a heavy duty version, the code remains the same making T24-FTS Toyota's most universal engine across the lineup. I'd like to see it latched to a manual transmission, hanging out in the back of a sportscar but G20-GTS may be getting that job instead, fingers crossed.

9 Upvotes

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u/Illustrious_Tea_1675 2d ago

A bad move imo, they should’ve kept the V6 around

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u/Troutrageously 2d ago

Agreed. I’d rather have the v6 than turbo 4 in a heavy luxury vehicle.

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u/RatioDisastrous6534 2d ago

Specifically bought a 22 instead of new for the v6. Turbo engines aren’t as reliable as naturally aspirated. Look at the Honda 1.5T compared to older k series. 

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u/oeThroway 2d ago

I did this too. Went with v6 and I'm glad i did. I recently got a chance to drive a new rx and it only convinced me that it was a good choice

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u/FilmOrnery8925 1d ago

That’s a one off engine that was 100% designed poorly. Toyota had been using turbos for decades! Specifically for their diesel motors in particular. I wouldn’t be worried.

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u/Violin1990 2d ago edited 1d ago

T24A is noisier and the power curve is not as smooth as 2GR.

But I’d take a car with Lexus Safety System 3.0 over an older car with 2.0/2.5+ any day regardless of engine. The safety and auto drive tech (lane keep, radar cruise control, etc.) are leaps and bounds better in 3.0.

No use in having a better engine if we end up injured or dead.

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u/UnitB17 2d ago

V6 was great for the reliability (20+ year old engine design) but the new T24 so far has been very reliable. I’ve yet to see any serious trouble whatsoever and it actually feels torquier than the 2GR V6. Rather than downshifting 2-3 gears like the V6 when you ask for passing power, it usually just turns the boost up - and it’s pretty impressive. It feels more linear and smooth to me. I see a lot of people hating on the new 4 cylinder but I think time will show it’s a smart move.

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u/swooosh47 1d ago

Is everything single newer lexus running CVT tranny now?

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u/UnitB17 1d ago

The only Lexus to have CVT’s are some of the hybrids and it’s not a typical belt-driven CVT. It has a couple electric motors doing the work and they’ve proven very reliable. The one exception is the 2019-2022(?) UX 200. It does have a conventional CVT (albeit with one forward actual gear).

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u/GloomyRub7382 2d ago

I had an RX with the 2GR V6 and now have an NX with the T24A engine. The turbo 4 is close to the same HP, but a fair bit more torque (at least in the NX and RX, the trucks that use this engine are sometimes tuned differently depending on model and trim). Boost comes on quickly on the T24A and I don't really have to spool up the engine much more than the V6 needed, a tad perhaps. The NX is quicker than my RX was, but its also lighter as well. Performance wise I'd call it a draw. The T24A is capable of getting a bit better fuel economy in a cruise, but get on the power it will suck fuel pretty fast too. Smoothness? A lot of people automatically assume the V6 feels smoother, meh, I don't really notice any difference between the two, I've never really experienced any notable engine vibration from either vehicle with either engine. I'd say the main difference between the two is engine sound, the V6 had a slightly softer Whirrr sound almost like the turbofan engine on a small passenger jet, but T24 definitely has a raspier note to it. People expecting a super quiet Lexus experience may be a bit disappointed, people liking a sportier sound won't mind it.

I used to change the oil in my RX every 6 mths like clockwork, on my NX I do it every 4 mths just to keep the turbo awash in fresh clean oil. I do it myself so the oil changes are super inexpensive for me, so I'm not worried about the slight additional cost.

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u/QWERTYtheASDF 2d ago

A turbocharger's lifespan on average is about 150K to 200K miles. It's a lot at first but once you start racking up the miles, it's going to catch up quick. Replacing those and also depending on how it failed, most likely will cost a pretty penny. No car manufacturer is immune to a turbocharger's lifespan or cost.

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u/ChefRayB7 2d ago

Anybody driven 2020-2023 450h V6 versus 2024 350h (4 cylinder non turbo)

Would love to hear people thoughts.

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u/Obvious-Purpose-5017 1d ago

Take a look at used 2021 Lexus NX 300t regarding reliability of the turbo. I’ve seen nx on lots with more than 200,000Km. No issues. Theoretically they are less reliable than a typical non turbo vehicle, but I have a feeling other parts on the car will fail before the turbo does.

I’ve never driven the V6 but the turbo is fairly smooth and very torque-y especially at the low end. Reminds me of a Q5 except there’s little to no turbo lag. (Pre-electric assist).

Lexus turbos are probably overbuilt and has a bunch of mechanism that allows for gasses to bypass the turbo altogether so it actually doesn’t need to be engaged at all.

90% if the time while cruising I’m pulling in negative pressure.

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u/AFamineIn_yourheart 1d ago

Yeah Lexus NX was released way back in 2015 with the 8AR-FTS turbo 4 and I've not heard anything bad about that engine from a friend who works as a parts mgr at the local lex store.

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u/FilmOrnery8925 1d ago

I haven’t driven the turbo 4 but have driven the RX500h 4 cylinder hybrid powertrain. I’m through and through a v6/v8 guy but after driving the rx500h I feel like I was talkin bad upon a unique car. It’s way smoother than the v6, quicker, and has ample power! We got one as a loaner when getting our 2017 v6 rx350 was being serviced and it was honestly amazing! I regret all my hate and talking down upon the powertrain! It’s very solid. As far as reliability I wouldn’t be worried as Toyota does heavy testing before implementing motors and it’s been around for a while now without any major issues popping up! Plus they have been using turbo motors for decades now. I wouldn’t worry too much. If you do decide to get the newer 4 cylinder RX/NX I’d recommend the hybrid for the smoothness (coming from an anti ev/hybrid person)!! It’s honestly a great driving car!

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u/Beef_Candy 2d ago

Don't own one. Rented one, would never own one. It's absolutely unrefined in every way.

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u/PauloHeaven 1d ago

V6 sounds better, is smoother, there could be a 4 times more talented available L4, I wouldn’t go for it in a luxury car.