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[Lincs Robert]

Ok, so what are the advantages (if any) of a 16v diesel vs an 8v version.

Why then would Ford switch from mass producing a 1.6 16v to an 8v version. I'm sure the 16v version would be more expensive to make & if that's the only reason then fine. They've carried it forward and the new(ish) 1.5 tdci engine is also 8v, so they seem quite committed to doing whatever they have done.

Cheers

[Viral_Jim]

Perhaps they see this as the last generation of non-commercial diesel engines so they have opted for cheaper, easier to produce lumps rather than trying to drive any innovation in that sector. 

[Marks DTM Calib]

16V units require swirl flaps, as well as the additional valves, for optimum combustion.

So its quite simply much cheaper to make.

Of course, 16V units breath quite a bit better so can make more power......if that's what you need.

[Lincs Robert]

Perhaps they see this as the last generation of non-commercial diesel engines so they have opted for cheaper, easier to produce lumps rather than trying to drive any innovation in that sector. 

Fair point & I suppose that cost IS also a major factor for a volume manufacturer.......

[Viral_Jim]

16V units require swirl flaps, as well as the additional valves, for optimum combustion.

I've never understood the purpose of these? How they work yes, why have them... no 

[TheBoy]

16V units require swirl flaps, as well as the additional valves, for optimum combustion.

I've never understood the purpose of these? How they work yes, why have them... no 

Its about optimising the speed of the inlet air, to improve low down torque/power on multivalve enignes.

16v units otherwise run better at high RPM, compromised on low RPM
8v units run better low RPM, comprosmised high RPM


Much like the reasoning ofr the multirams on a v6 Omega

[Doctor Gollum]

And why Mercedes use three valve engines now... a larger single exhaust valve is beneficial apparently.

[TheBoy]

And why Mercedes use three valve engines now... a larger single exhaust valve is beneficial apparently.

I suspect that is cost savings, dressed up as marketing bullshit.  Not helped by the fact that we all know Mercedes don't understand how to build a car, just put them together from a supplier parts bin.

3 valve per cylinder engines aren't unique, though are rare now.

Also, you don't put swirl flaps on exhaust, its intake air you want to play with.

[frostbite]

Didnt bmw have a problem with swirl flaps getting sucked into the chambers or was it vauxhall?

[Lincs Robert]

Didnt bmw have a problem with swirl flaps getting sucked into the chambers or was it vauxhall?

I know BMW did, not sure about Vx though .....

[Doctor Gollum]

Didnt bmw have a problem with swirl flaps getting sucked into the chambers or was it vauxhall?

Both.

[Marks DTM Calib]

Never heard of it on a Vx (certainly not the 1.9 or the 1.7 plus the earlier 2.0/22 setups its pretty much impossible for it to get in), BMW 6 cylinders tended to ingest the screws from the flaps and in some rare cases the entire flap.

[baggers]

I'm struggling to find an advantage of having diesel 

[Lincs Robert]

I'm struggling to find an advantage of having diesel 

Ok, my last Mondeo was £285 per year to tax and averaged 30 if I was lucky - 2.5T petrol
Current one is £30 a year to tax, averages 53 day to day & 60+ on a run. 1.6 Diesel

Admitted the power is half what the petrol one was, but so far that's never been a problem .....

[tunnie]

I'm struggling to find an advantage of having diesel 

All depends on your circumstances and type of commute/driving. For me:

My diesel is £30 a year to tax, with 50-65 mpg without even trying. (700+ from a tank)

Compared to £285 or £500 to tax per year and 25mpg 

Personally I enjoy the diesel driving experience, the low down torque and mid-range punch just when you need power without spanking the nuts off a small turbo petrol.