Evos, STis, Q7s, and why a smaller engine is not always economical

Hi Baraza,

I have a number of questions, but before I begin you must agree that Subarus are miles ahead of Mitsubishis.

Look at this tyranny of machines: Subaru WRS STi may be outdone by the Evo, but the Forester will outdo the Outlander and the Airtrek. So, who is the winner in the ‘majority race’?

Now, to my questions:

 The other day I got a chance to be in a Volkswagen Golf GTI ABT. What fascinated me the most was the top speed, which, if my eyes did not deceive me, is a sweet 300km/h.  What does ABT mean, and what makes it better than a Volkwagen which has none?

 Between the BMW X6 and the Audi Q7, which is the best in terms of fuel consumption, stability at high speeds and resale value?

 When does a car consume more? When on high or low speeds? I asked someone who owns a Subaru Legacy B4 and he told me that at high speeds, he can make 10km/l but  in traffic jams, he can end up with a painful 7km/l.

 Finally, anybody who owns a Toyota Sienta as a family car must HATE his or her family. Sitting in the  far-rear seats feels like sitting in a pan.  No window, no nothing.

PS: I salute those guys who have dared bring the Rolls Royce and Lamborghini to Kenya. Kindly send me a contact if you know any of them ‘cos I really need a lift in one of those machines. I wonder why nobody has given us the Nissan GTR.

Phineus

 

Hello Sir,

If you want to discuss who wins the ‘majority race’ between Subaru and Mitsubishi, I’d like you to first point out a Subaru lorry, a Subaru bus, a Subaru van, a Subaru pick-up and a Subaru SUV. No, the Tribeca is not an SUV because it won’t go off-road, so try again.

Also, point out a Subaru television — yes, Mitsubishi builds electronics too, such as TVs on which you can watch Subarus losing to Mitsubishis.

Any pointers?

I didn’t think so.

The actual battle lies between the WRX STi and the Lancer Evolution. Leave the rest out of the argument for the time being. That said, I may bash on the little STi every now and then, but I believe I have mentioned here more than once that I might be a sucker for the Forester STi.

That may be the only Subaru I’d actively seek to buy: if I was to buy any other, it would be for lack of choice and/or desperation; which is the same thing really.

I know the Volkswagen Golf GTI’s speedometer has 300 scrawled on the exciting side of the scale, but it won’t do 300 — at least not without some major modifications to the engine.

This brings us neatly to the ABT you inquire about: ABT is not a spec level for the Golf; it is a tuning house that fettles German cars. What they do is take a boring briefcase, which is what most German saloon cars look like; then convert this briefcase into a fire-breathing chariot capable of moving at speeds normal people should not be moving at.

One of my neighbours has a Passat sedan with an ABT touch-up. It still looks like a briefcase, but one with bigger tyres and a Roman candle under the bonnet.

On the BMW X6 vs Audi Q7, both are rubbish. Depending on which engine you have opted for, both will guzzle. At least with the X6 you have the option of the X6 xDrive30d, which has a detuned 3.0 litre six-cylinder turbocharged diesel engine that can still move the car respectably fast if you so wish and return fair economy figures.

The Q7 comes with a large petrol engine that burns fuel at Arab-pleasing rates, or with a puny diesel engine that needs thrashing to eke out any semblance of motion out of it, so it will still send your money to the Middle East either way.

High speed stability is not bad in either car, but then these are big and heavy vehicles, maybe “high speeds” are not what you should be aiming for in them.

Also, at high speed the fuel evaporates in ways that make the stock price graphs in the Arabian financial index blink green and shoot skywards. Resale value? It will not be so great once the general public reads this.

A car consumes a lot of fuel at speeds below, say, 40-50km/h, consumes the least fuel at speeds between 80km/h and 120km/h, then the consumption goes up again from 120km/h onwards.

At 200km/h, it burns quite a lot of fuel. At 220km/h, it eats fuel in huge lumps. At 250km/h, the Arabs will send you t-shirts and Christmas cards.

There are a lot of caveats involved here though; the biggest ones surrounding engine size, transmission type and traffic conditions. Bigger engines are more economical at slightly higher speeds: for example, the Lamborghini you gush about later in your message is better off at 120 than it is at 80.

Smaller engines thrive at “non-motorised” pace: a 600cc Kei car is better at 70-80km/h than it would be at 120km/h.

Automatic transmissions may not allow short-shifting unless equipped with a manual override or has numerous ratios like the Range Rover’s 9-speed. So at low speed, it will likely be at a very low gear, possibly first or second, which is exactly when Shell and BP start awarding bonuses to employees. You may be better off maintaining 100km/h, give or take 15km/h.

Traffic conditions are fairly obvious: an open road is far better than a clogged one. Stop-start driving triples your fuel consumption as compared to steady-state driving.

These factors may apply in a variety of permutations, along with other variables such as vehicle weight, aerodynamic profile, right-foot flexibility, mechanical condition, and fuel quality, to prove one point I have been saying all along: fuel economy is not an exact science.

This is also why I nowadays refrain from quoting definite consumption figures for readers, because there is no telling what particular Arab-centric circumstances may be at play in a particular driving situation.

I have had people who revert like this: You said you did 25km/l in your stupid Mazda. Why can’t I achieve the same result? That is a difficult question to answer.

Interesting feedback on the Sienta. I will be careful not to get into the back seat of one. If Toyota reads this, then good for them. They will hopefully now install a window at the back of this car.

I may have the contact details of the chap in the green Lamborghini, but sadly for you I will not share them. That is proprietary information to begin with; and anyway, I want to get a lift from him too. The fewer of us lift-begging lowlifes there are banging at his door, the higher the chances of one of us actually getting to sit in that car.

In the course of looking for the man, do look around you in traffic. There are Nissan GTRs around; quite a number, in fact. I’d say there are more GTRs around than there are Lamborghinis. And yes, I have the contact details of some of the GTR owners; and no, I will not be sharing those either.

_______

Greetings Baraza,

I bought a 1993 Toyota Starlet EP82 from my employer after she endured all manner of abuse from five different drivers for seven years.

She has done Mombasa, Loitokitok, Nyahururu, Kakamega, Murang’a, Nyeri, Nakuru, and Kisumu countless times.

She was also once hit from behind by a Mercedes in control of a drunken guy, but the little lady flew and perched herself atop a fence, with her rear wheels stuck to the body.

Her engine still holds and is strong. With four full grown men cramped inside her as she purrs uphill, she overtakes boys like Fielders, Airwaves, and Pajeros like a joke. I bought her because of the price, the fuel consumption and her power.

Recently, however, she started smoking in the morning like crazy! Grey and heavy smoke. She does this in front of other ladies who park overnight next to her, like Vitzs, Honda Fits and Duets, and she is the least remorseful.

Our parking lot slants 40 degrees, and yesterday I let her rest with her nostrils facing downhill towards the fence. I think she wasn’t happy; to get out, you have to reverse, look for space to turn and head to the gate at the top of the hill.

She embarrassed me so badly with her smoking that I needed full lights to see. I could even hear the other ladies nearby (Vitzs, Fits and Duets) choking.

At speeds of 80kph on Thika Road, if I sneak a peak on the rear view mirror I can see her smoking behind my back.

One mechanic told me to do an engine overhaul, another one said I change piston rings, another that I should replace the entire engine, and yet another that my lady is drinking oil, even though I religiously service her on due dates.

Please help save this relationship because, since I don’t smoke myself, I can’t live with her like this, not matter how much I love her.

Finally, I recently drove an Allion, 1800cc, dual VVTi to Loitokitok and back to Nairobi. It was amazing because, on average, he did 23km/l. The Starlet returns 16km/l on the same journey with the same shopping and passengers, yet I thought a bigger engine consumes more. Some of us fear big engines (by big I mean anything beyond 1,490cc).

Godfrey

 

Godfrey, I also once had an EP82 that gave me trouble-free operation until some idiot tampered with the wiring harness linking to the ECU and from there it was one problem after the other: stalling, poor consumption, lack of power… all this against the backdrop of an intermittent now-on-now-off ‘Check Engine’ light.

It was eventually sorted though, and shortly afterwards, the car found a new owner.

I’d like you to fit four grown men in that Starlet then challenge me to a hill-climb drive-off we see if what you say is true. I’ll bring a Pajero, possibly one with a 3.8-litre V6 petrol engine (I believe you listed a Pajero as one of your victims), and I’ll be alone in it.

Any readers out there who want to place bets on who reaches the mountain-top first are free to do so, but we split the winnings 50-50. Care to indulge?

Anyway, the smoke: the heavy grey vapours indicate either a blown head gasket (ruptured or cracked), which is letting water into the cylinder; water which is then burnt off as steam; or the vehicle may be burning ATF (automatic transmission fluid), if the vehicle is automatic.

Another cause could be oil and water mixing: either water is getting into the oil and the oil gets burnt, or oil leaks into the coolant, and the coolant in turn is leaking into the cylinders. Either way, that engine needs to be taken apart.

Now, that Allion. First off, it has VVT-i, which the Starlet lacks. That’s a plus.

Then there is the small matter of highway driving. You see, at highway speeds, bigger engines return better economy. It doesn’t apply across the board, I mean, a Bugatti Veyron is not the most economical car at highway speeds, but for motor vehicle engines between, say, 800cc and 2,000cc, at 120km/h the 2.0 litre will be most economical.

Why? Because it requires little effort to attain and maintain that speed. It will definitely have taller gearing, so 120km/h will correspond to roughly 3,000rpm in top gear.

Smaller cars will be revving higher and longer, therefore burning more fuel. The Allion is also more aerodynamic than the little hatch, it has a very pointy nose: so it encounters less resistance at those highway speeds. Less resistance means less engine effort to cut through the air.

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