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kobayashiGT

Perodua Ativa SUV: 1KR-VET 1.0L 3cyl turbo deep dive

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Perodua-D55L-Render-Blue-1-e161400387999

source: https://paultan.org/2021/02/22/perodua-ativa-suv-1kr-vet-1-0l-3cyl-turbo-deep-dive/

Perodua’s long-awaited compact SUV, the Ativa, is the talk of the town. Based on the attractive Daihatsu Rocky/Toyota Raize and utilising more of its Japanese partner’s technology than ever before, the D55L promises to be the most advanced Perodua ever – marking a new era for the national carmaker.

So far, we’ve looked at the specs, name and pricing; here, we’re taking a deep dive into the Ativa’s new engine, the 1KR-VET. Utilising just three cylinders and 1.0 litres in displacement, it will mark Perodua’s first foray into the world of turbocharging, making it bang up to date with the industry trend of downsizing.

As the name suggests, the 1KR-VET is part of Toyota’s KR engine family, which also includes the 1KR-VE naturally-aspirated mill found in the Bezza and Axia. The lineup shares the same aluminium block, cylinder count and 71 mm cylinder bore, but the unit in the Ativa will have a scant 0.1 mm shorter piston stroke than the rest at 83.9 mm. This knocks two cubic centimetres off the displacement, dropping it down to 996 cc.

The engine’s stroke has likely been shortened to reduce the compression ratio, which has fallen from 11.5:1 on the Bezza and Axia to 9.5:1. This facilitates the addition of the already-compressed air from the turbo, which would otherwise cause knocking.

1KR-VET-e1614004694631.jpg?w=185&h=240&sPerodua-Ativa-D55L-features-teaser.jpg?w

As is typical for a simple turbo engine, the Ativa will feature a single-scroll turbocharger and a front-mounted intercooler. To keep costs down, it will get regular multi-point injection rather than the more expensive direct injection technology; it will also retain the Bezza/Axia’s variable intake valve timing, double overhead cams, timing chain and four valves per cylinder (12 in total).

Naturally, with a turbo in place, the 1KR-VET is significantly more muscular than the 1KR-VE, with outputs of 98 PS at 6,000 rpm and 140 Nm of torque from 2,400 to 4,000 rpm. Against the Bezza and Axia, the Ativa will have an advantage of 30 PS and nearly 50 Nm, which is not to be sniffed at. Those figures are also not a world away from the Nissan Almera, which has a similar 1.0 litre turbo triple and CVT configuration.

To enhance the sensation of speed, the Rocky and Raize get a Power button on the steering wheel, which remaps the engine and gearbox for quicker throttle response; it’s unclear, however, if the Perodua version will come with the same function.

Perodua-Ativa-D55L-leaflet-2.jpg

But the turbo isn’t just good for power – Perodua is claiming an impressive fuel consumption figure 18.9 km per litre for the Ativa. That’s even better than the Daihatsu and Toyota’s 18.6 km per litre with front-wheel drive, although that number was achieved on the stricter WLTP cycle.

The downsized engine and stepless transmission go some way towards improving efficiency, but the Rocky and Raize also benefit from a start-stop system. The Bezza and Myvi already come with this feature, but the one in the Daihatsu and Toyota has been improved slightly, switching the engine off when decelerating from 9 km/h (up from 7 km/h).

Looking at the technologies, output figures and efficiency numbers on offer, we’re pretty sure most of you can’t wait to try out the Ativa for yourselves (and we can’t, either!). But what do you think – is turbocharging the right path for Perodua, or would you have preferred it to stick with a more conventional naturally-aspirated engine? Sound off in the comments after the jump.

 

 

 

 

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Supersonic

How muchie if this SUV sell in sg? [confused]

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Turbocharged
9 minutes ago, 13177 said:

How muchie if this SUV sell in sg? [confused]

image.png.6c549c8859393a7263326e0f52d41ef3.png

I am looking at 79K - 85K. Don't think they can seller more expensive than toyota.

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Supersonic
21 minutes ago, kobayashiGT said:

image.png.6c549c8859393a7263326e0f52d41ef3.png

I am looking at 79K - 85K. Don't think they can seller more expensive than toyota.

Dont know got people buy this Ativa even it is priced at $80k range? You see even the Bezza also not much business?! 

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4th Gear (edited)

I think this is a light pressure turbo tuned for fuel efficiency more than power. 

Conti/korean 1l turbo already hitting around 120hp/200nm from factory. That's a significant deficit in power here.

Edited by Ceecookie
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Turbocharged
4 minutes ago, 13177 said:

Dont know got people buy this Ativa even it is priced at $80k range? You see even the Bezza also not much business?! 

Now SUV trend mah. this should be doing better. hahaha.

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Supersonic
2 minutes ago, Ceecookie said:

I think this is a light pressure turbo tuned for fuel efficiency more than power. 

Conti/korean 1l turbo already hitting around 120hp/200nm from factory. That's a significant deficit in power here.

Latest Audi A1 1L has 2 versions, 95 and 120hp.

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Supersonic
13 minutes ago, kobayashiGT said:

Now SUV trend mah. this should be doing better. hahaha.

Now SUV trend? 95% people i know no drive SUV le?! Lol.

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Supersonic
Just now, 13177 said:

Now SUV trend? 95% people i know no drive SUV le?! Lol.

That's overall industry trend

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Supersonic
46 minutes ago, Lethalstrike said:

Can drop in the 3 cylinder turbo 1.6L from GR Yaris boh? 😁

Need a lot of engineering prowess to do that.

This is on TNGA-A platform.

Yaris on GA-B front platform.

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Turbocharged
3 hours ago, Lethalstrike said:

Can drop in the 3 cylinder turbo 1.6L from GR Yaris boh? 😁

Speaking of which, you know daihatsu copen comes with a GR badge!

2020-Daihatsu-Copen-GR-Sport-front.jpg&f

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Is this 100% same with Yaris Cross sold in Singapore ? For Yaris Cross, Fuel economy and acceleration considered impressive, but maneuverability is not that good due to soft suspension tuned

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Supersonic
16 minutes ago, kr_mcf said:

Is this 100% same with Yaris Cross sold in Singapore ? For Yaris Cross, Fuel economy and acceleration considered impressive, but maneuverability is not that good due to soft suspension tuned

Toyota Raize

Daihatsu Rocky

Can consider GR Suspension

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Supersonic
17 minutes ago, kr_mcf said:

Is this 100% same with Yaris Cross sold in Singapore ? For Yaris Cross, Fuel economy and acceleration considered impressive, but maneuverability is not that good due to soft suspension tuned

Yaris cross design not say nice le. Saw one on the road the other day, looks like a smaller version of RAV4.

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