RE: PistonHeads trolls MPG Marathon

RE: PistonHeads trolls MPG Marathon

Wednesday 7th October 2015

PistonHeads trolls MPG Marathon

Dream drive turns into a hellish reality on the fuel economy challenge



'Cruel' best describes this year's MPG Marathon, because it had all the right ingredients for a PH Dream Drive: unseasonably warm and sunny weather, the best roads Oxfordshire, Wiltshire, Gloucestershire, Hampshire and Surrey could offer, plus a Caterham to drive them in.

Stickers you don't expect on a Caterham
Stickers you don't expect on a Caterham
Sadly, the 400-mile drive created some of the most frustrating and miserable moments I've ever had behind the wheel. The reason? Fuel efficiency. Of course.

The brief was perfectly straightforward. Mischievous Caterham had decided to troll this year's MPG Marathon by attempting to beat the hybrids and small diesels at their own efficiency game, but there were two fatal flaws with its plans that unravelled (very) slowly over the next two days. We'll get to that though.

Rewind to last Tuesday morning and pulling into the car park at a posh hotel in Oxfordshire I felt pretty confident about the task ahead. Confident because, believe it or not, us car hacks can be pretty handy at saving fuel when we need to - which is pretty often, such is our draw to the warm, loving glow of the fuel warning light.

Most famous in car hackery folklore is the writer who managed to coax an incredible 21mpg from a Murcielago, gliding gracefully to the pump as it ran completely out of fuel.

Shattering my confidence in one foul instant is the sound of a loud, heated discussion at the stately home hotel. My fellow competitors are discussing their pre-prepared routes in great detail. One argues his road route has the more favourable topography with the lightest amount of traffic. When someone starts mentioning wind direction I begin to feel faint.

Team PistonHeads, meanwhile, doesn't even have a map, has no idea about a route and had to look up the word 'topography' to make sure it means 'hills'. It means hills.

Not too fast now John!
Not too fast now John!
Wing and a prayer
At least we have the right tool for the task. The Caterham 160S is the epitome of efficiency. Despite producing a measly 80hp from its tiny turbocharged 660cc triple it reaches 60mph in less than seven seconds and even tops out at 100mph. Wearing skinny tyres and weighing just 490kg we're in with a good chance.

With driver briefing done, map acquired and MPG Marathon veteran Katie kindly agreeing to be my co-driver and human ballast we hit the road. Right after borrowing a sat-nav from a fellow competitor (thanks Alex).

Since we're going up against hybrids and diesel and, bizarrely, a 1994 Ford Mondeo, it's unlikely we'll score an outright best mpg over the next day, especially since one pair of journos are aiming for 110mpg. Where we can disrupt the order is by recording the biggest outright improvement in our fuel consumption over the claimed combined figure. Easier said than done however...

'Our' Caterham has an astonishing claimed figure of 57.6mpg - incredible since the last R300 I spent time with never saw mid-twenties. All that's required, I tell myself, is to not spool up the little Caterham's turbo, maintain momentum and not stop at junctions.

Not awakening the turbo is a hard task. Changing up as quickly as I can at around 2,200rpm I can hear the wastegate working away hard. Anything less and it bogs down. In a more powerful car I'd also miss gears but it's not an option here as the 160 has the narrowest of power bands.

Despite all this, within minutes I've overtaken three of my fellow competitors who wave us on enthusiastically as they crawl along at 28mph on roads marked as national speed limit.

Slow in a Caterham here very difficult
Slow in a Caterham here very difficult
Heady heights
Before I set off I'd already promised myself I wouldn't hold up any other road users - it's not really the PH way of doing things. That said, the little Caterham's gearing favours a fractionally slower 50ish, but big hills make up the deficit.

At this speed the Caterham is proving a joy, as I bravely carry as much speed as I can through the corners. Care is still needed though, those narrow Avon tyres can generate some big understeer if you overcook it. The steering, meanwhile, is buzzing with useful information and feels hardwired to your brain.

Not that the 160 is perfect. Far from it. Lift off at speed and the flying brick slows alarmingly. It doesn't help that, as well as the poor aero, the short gearing brings huge engine braking. We begin experimenting with coasting.

Katie and I spend the next 200 miles arguing if it's better to coast up or down hills. I favour driving down hills and coasting up the next. In any case it helps pass the time as I drive slower than I think I ever have.

The slow progress is rewarded at the end of the day with a refill that has me guesstimating we're averaging around 70mpg. We're on for a class win.

Made it!
Made it!
Desperate times...
The next day, it's still bright and sunny when we set off. Since our lack of route planning worked so well the day before, we don't bother with even a cursory look at where we're heading on day two.

This proves disastrous as our sat-nav plots a course along the M4. With zero chance of coasting and terrible aero, who knows what cruising at 70mph is doing to our economy.

We slow down and tuck in behind a some trucks to try and minimise the damage but it couldn't stop the fuel gauge's sickening slide south. From then on it gets a bit weird...

At a coffee stop, instead of driving up the long driveway, I get out and push. In towns and villages I roll through silently, engine off, desperately trying to claw back an advantage.

Even in these desperate times I'm still passing other competitors. There is actually a set time limit to complete each stage, but these guys are so clever they calculate the lowest possible average speed to complete the course and drive at that.

Arriving at the finish line I'm exhausted, sunburnt and completely in the dark on how well (or badly) we've done.

Leaving it to the AA to officially brim the Caterham's fuel tank I expect the worst. Over 365 miles we've burnt 28.11 litres of unleaded which equates to a genuine 59.0mpg - a tiny 1.4mpg improvement over the claimed figure of 57.6mpg. Only the '94 Mondeo performed worse with a still pretty reasonable 41.6mpg.

I can't quite decide if our figure is a success or a terrible disappointment, but in any case next year Caterham should still have another crack. I think a nice six-speed manual 420R will do the trick, that and a better, more prepared driver.

Me? I drove home on the rev limiter, just to restore some balance.


CATERHAM 160S
Engine: 660cc, three-cylinder turbo
Transmission: 5-speed manual, rear-wheel drive
Power (hp): 80@7,000rpm
Torque (lb ft): 107@3,400rpm
0-62mph: 6.9sec
Top speed: 100mph
Weight: 490kg (plus driver)
MPG: 57.6 (NEDC combined)
CO2: 114g/km
Price: £18,995 (as standard, price tested £25,535 including factory build at £3,000, Full windscreen at £1,250, full weather equipment at £1,550, heater at £300, lowered floors at £395 and 12v socket at £45)









Author
Discussion

andburg

Original Poster:

7,214 posts

168 months

Wednesday 7th October 2015
quotequote all
well done PH!!

next time do it in something with a V8!

glazbagun

14,257 posts

196 months

Wednesday 7th October 2015
quotequote all
Epic restraint driving like that for so long, but why did you do 70 on the Motorway? Surely even dropping to 60 would have led to a marked increase in economy, no?

MikeGoodwin

3,323 posts

116 months

Wednesday 7th October 2015
quotequote all
What type of sick bd has a MPG competition?

Absolutely sick of all this eco bullst.

j90gta

563 posts

133 months

Wednesday 7th October 2015
quotequote all
Just goes to show the irrelevance of Manufacturers' fuel consumption (and emissions!!!) figures. They bear no resemblance whatsoever to what is achievable in real-world driving conditions. Surely it is about time that the details of how a car performs are not left up to people in white coats putting a car in a laboratory? The car-buying public is being totally misled, and often their decision of what to buy is influenced by the Manufacturers'claims. What would happen if all the motoring organisations and motoring press were each lent a different car from the production line (manufacturers' press cars are often set up differently to those available to the general public) for evaluation, and pooled their findings to result in a more realistic set of figures?

P.S. Congratulations on seeing this as an opportunity to approach an M.P.G. Marathon from a different perspective.

MrBarry123

6,025 posts

120 months

Wednesday 7th October 2015
quotequote all
"Sponsored by Volkswagen"

Conscript

1,378 posts

120 months

Wednesday 7th October 2015
quotequote all
"Despite all this, within minutes I've overtaken three of my fellow competitors who wave us on enthusiastically as they crawl along at 28mph on roads marked as national speed limit."

mad

anonymous-user

53 months

Wednesday 7th October 2015
quotequote all
MikeGoodwin said:
What type of sick bd has a MPG competition?

Absolutely sick of all this eco bullst.
Kind of ironic when you think about it as it is just a waste of fuel.

Superhoop

4,676 posts

192 months

Wednesday 7th October 2015
quotequote all
[quote=j90gta]Just goes to show the irrelevance of Manufacturers' fuel consumption (and emissions!!!) figures. They bear no resemblance whatsoever to what is achievable in real-world driving conditions. Surely it is about time that the details of how a car performs are not left up to people in white coats putting a car in a laboratory? The car-buying public is being totally misled, and often their decision of what to buy is influenced by the Manufacturers' claims.

quote]

When you say misled by manufacturer's claimed figures - You do know that the figures they publish are as a result of a test that the manufacturers themselves a)no longer think is realistic and b)that they legally have to follow and that they are legally obliged to publish the fuel economy figures of that test only, so couldn't publish any other figure even if they wanted to??

NelsonP

240 posts

138 months

Wednesday 7th October 2015
quotequote all
j90gta said:
Just goes to show the irrelevance of Manufacturers' fuel consumption (and emissions!!!) figures. They bear no resemblance whatsoever to what is achievable in real-world driving conditions.
What? They don't? Since when? I don't believe it!

rofl

Durzel

12,232 posts

167 months

Wednesday 7th October 2015
quotequote all
Not killing yourself before the end of the journey should've been worth some kind of award.

j90gta

563 posts

133 months

Wednesday 7th October 2015
quotequote all
(quote]

When you say misled by manufacturer's claimed figures - You do know that the figures they publish are as a result of a test that the manufacturers themselves a)no longer think is realistic and b)that they legally have to follow and that they are legally obliged to publish the fuel economy figures of that test only, so couldn't publish any other figure even if they wanted to??
[/quote]

In view of the VW debacle, now is the time to change the testing procedure. I'd like to think that there wouldn't be too much objection from the motor industry. It would be the ideal opportunity for some positive PR, but how many other manufacturers would be exposed??

jamespink

1,218 posts

203 months

Wednesday 7th October 2015
quotequote all
GravelMachineGun said:
MikeGoodwin said:
What type of sick bd has a MPG competition?

Absolutely sick of all this eco bullst.
Kind of ironic when you think about it as it is just a waste of fuel.
clap

Superhoop

4,676 posts

192 months

Wednesday 7th October 2015
quotequote all
j90gta said:
In view of the VW debacle, now is the time to change the testing procedure. I'd like to think that there wouldn't be too much objection from the motor industry. It would be the ideal opportunity for some positive PR, but how many other manufacturers would be exposed??
It was changing anyway - 2017

Edited by Superhoop on Wednesday 7th October 14:35

jamespink

1,218 posts

203 months

Wednesday 7th October 2015
quotequote all
As someone who easily justifies the use of a 400BHP V8 I cringe at the thought of more than 5 minutes participating in one of these events. Whats the point? 28 mph on a main road in any car is suicide let alone in a little car, and the tedium! I can feel my life ticking away thinking about it! And, as has already been mooted, its by definition ironically 100% wasteful, unless you needed to go to the finish point anyway... Very funny...

BTW, how many more months have Audi paid for those A3 ads at the foot of the page?

carlosbutler

150 posts

163 months

Wednesday 7th October 2015
quotequote all
125cc scooter, 2L/100KM (~135mpg). Easy.

joe_90

4,206 posts

230 months

Wednesday 7th October 2015
quotequote all
Do they do this every Friday on the M4?

jontbone

214 posts

218 months

Wednesday 7th October 2015
quotequote all
Conscript said:
"Despite all this, within minutes I've overtaken three of my fellow competitors who wave us on enthusiastically as they crawl along at 28mph on roads marked as national speed limit."

mad
IN my opinion each competitor should be doing the actual speed limit on each road. 28 in a 60 is potentially dangerous and at best infuriating for other drivers

glazbagun

14,257 posts

196 months

Wednesday 7th October 2015
quotequote all
jamespink said:
GravelMachineGun said:
MikeGoodwin said:
What type of sick bd has a MPG competition?

Absolutely sick of all this eco bullst.
Kind of ironic when you think about it as it is just a waste of fuel.
clap
It low speeds on an NSL aside, it doesn't really bother me to let them do what they want. I think things like the World Solar Challenge are pretty cool, even though they'd be painful to watch and no doubt even more painful to actually do. I might think WRC is pretty awesome, but that doesn't mean there's anything wrong with Road Rallying or people having a MK 1 Insight economy marathon.

SpudLink

5,669 posts

191 months

Wednesday 7th October 2015
quotequote all
andburg said:
well done PH!!

next time do it in something with a V8!
A suitable outing for the re-born TVR. Enjoy a proper hoon, and when they reveal the MPG figure at the end, shrug you shoulders and say 'oh well, never mind'.

Midshipracer

229 posts

181 months

Wednesday 7th October 2015
quotequote all
Pictures and spec of the Mondeo! smile