C180 petrol courtesy car just 27mpg?

[BigSilverEstate]

The 2010-2012 C180 has a 1.8l turbocharged 4 cylinder engine delivering 154bhp at 5,000 rpm and 250N.m torque at 1,600-4,200 rpm

Must say I was very underwhelmed by the performance of these cars despite these respectable figures, so the weight must take its toll.

 

[LTD]

Are you really using all the horses ALL the time...if ever?

Who really gives a flying fook if I do or not ? I can if needed therefore I have the ability to do so. It's not really my fault Mercedes decided to fit my car with active-cylinder control, is it ?

But hey, my paint was the measured thickness when it left the factory, hasn't had a respray yet is rusting through.

Still accelerates like a scalded cat when asked though, no manner of paint correction stops that ....

 

[billywhiz]

The 2010-2012 C180 has a 1.8l turbocharged 4 cylinder engine delivering 154bhp at 5,000 rpm and 250N.m torque at 1,600-4,200 lb/ft.

Must say I was very underwhelmed by the performance of these cars despite these respectable figures, so the weight must take its toll.

I didn't realise that ^ - actually a very poor engine spec indeed - Could do with taking a leaf out of the VAG 1.8 engine range.

 

[BigSilverEstate]

I never understand why people post the maximum output when discussing general driving as only about 20 of those horses are in use for urban speeds, about 65 horse will do a ton, the rest is for faster than that.

When asked to produce all the available power, this car won't do anywhere near 27mpg.

Is this right? I thought power was for acceleration and overcoming wind and rolling resistance at fixed speeds i.e. you would certainly notice the difference between a 65bhp car and a more powerful one without having to exceed 100mph - for example when joining a motorway from a standing start.

 

[Dieselman]

Who really gives a flying fook if I do or not ? I can if needed therefore I have the ability to do so. It's not really my fault Mercedes decided to fit my car with active-cylinder control, is it ?

But hey, my paint was the measured thickness when it left the factory, hasn't had a respray yet is rusting through.

Still accelerates like a scalded cat when asked though, no manner of paint correction stops that ....

We're off into one of those 3rd dimensions again, aren't we...

 

[markjay]

A small capacity engine that is tuned to produce high output (for its size) will never be frugal, even when driven moderately.

True, I do not use all my horses, but then I didn't design the engine and didn't put them there... that's how the car came: peaky engine, needs to be revved, as result not very frugal.
The engine lacks in torque, I do 70mph at 3200rpm in my 1.8L with 5-gear autobox, while my previous 2.6L V6 car with 4-gear autobox did it at 2500rpm.

The result is that even when driven moderately it revs quite high. You will get same or even better fuel economy from a larger and more torquey engine that can cruise Motorway speed at 1500-2000 rpm.

 

[Dieselman]

I didn't realise that ^ - actually a very poor engine spec indeed - Could do with taking a leaf out of the VAG 1.8 engine range.

In what respect? I bet the VAG engine doesn't produce that much torque over such a wide rev range.

 

[Dieselman]

Is this right? I thought power was for acceleration and overcoming wind and rolling resistance at fixed speeds i.e. you would certainly notice the difference between a 65bhp car and a more powerful one without having to exceed 100mph - for example when joining a motorway from a standing start.

You need double the power to go 25% faster, so if 200 bhp gets it to 150mph, 25 bhp will see 75mph.

 

[LTD]

We're off into one of those 3rd dimensions again, aren't we...

... but we both know the answer to motoring nirvana.

It isn't a 2 litre-ish diesel estate ...

 

[billywhiz]

In what respect? I bet the VAG engine doesn't produce that much torque over such a wide rev range.

And this was in the heavy A4 body from 1997 ! > 15 years has passed - this is what I meant about a poor engine by todays standards. I guess it's about attracting the C180 to the corporate world masses by it's Co2 footprint.

Audi A4 1997

1.8T I4 20v DOHC
180 PS (132 kW; 178 bhp)235 N·m (173 lbf·ft)233 km/h (144.8 mph)7.9 sec

 

[BigSilverEstate]

You need double the power to go 25% faster, so if 200 bhp gets it to 150mph, 25 bhp will see 75mph.

Is this also the relationship between acceleration and power (all else being equal eg gearing, traction, weight etc)

 

[LTD]

Is this also the relationship between acceleration and power (all else being equal eg gearing, traction, weight etc)

Factor in comfort, grace and poise as well.

Then, and only then, you will realise that the S-Class is the very best car that Mercedes have ever built - despite current preconceptions.

 

[Dieselman]

The 2010-2012 C180 has a 1.8l turbocharged 4 cylinder engine delivering 154bhp at 5,000 rpm and 250N.m torque at 1,600-4,200 rpm

And this was in the heavy A4 body from 1997 ! > 15 years has passed - this is what I meant about a poor engine by todays standards. I guess it's about attracting the C180 to the corporate world masses by it's Co2 footprint.

Audi A4 1997

1.8T I4 20v DOHC
180 PS (132 kW; 178 bhp)235 N·m (173 lbf·ft)233 km/h (144.8 mph)7.9 sec

Over what rev range are the VAG torque figures. Mercedes has quoted a MINIMUM figure, VAG has quoted a MAXIMUM figure.

The MB engine has a much wider spread of torque to give more refined driving and produces more torque as a MINIMUM.

 

[V12]

Maybe the dealer had chipped it and the obc was over reading by 30%...sorry, couldn't help myself.

Sent from my GT-I9300 using MBClub UK

 

[Dieselman]

Is this also the relationship between acceleration and power (all else being equal eg gearing, traction, weight etc)

For acceleration you want high torque.

 

[billywhiz]

Over what rev range are the VAG torque figures. Mercedes has quoted a MINIMUM figure, VAG has quoted a MAXIMUM figure.

The MB engine has a much wider spread of torque to give more refined driving and produces more torque as a MINIMUM.

So, what are the MAX Merc figures then ?

 

[Dieselman]

So, what are the MAX Merc figures then ?

They don't publish them, they publish a minimum figure over a wide rev range. It would probably be safe to add 25-30% on top.

Makes the VAG look a bit feeble.

 

[LTD]

They don't publish them.

.. but they promote a 30yr corrosion warranty.

If they said it was raining outside, I'd step out to see if I got wet.

In my opinion, I would not trust anything Mercedes say, print or guarantee.

 

[billywhiz]

The details I gave are from roughly the same RPM spread against range.

Taken from the 2001 Audi A4 data.

How long?4548 mm

How heavy?1395 kg

What size engine?1.8 litre, 1781 cm3

How many cylinders?4, Straight

How much power?189.6 PS / 187 bhp / 139.4 kW @ 5700 rpm

How much torque?240 Nm / 177 ft.lb / 24.5 kgm @ 1950-4700 rpm

How quick?0-100 km/h: 8.20 sHow fast?236 km/h, 147 mph

 

[Dieselman]

How much torque?240 Nm / 177 ft.lb / 24.5 kgm @ 1950-4700 rpm

You didn't give a rev range previously, but irrespective, the Mercedes has more torque.