There’s more to this story than just fuel consumption. Premium fuel is less prone to deposit formation and sludging.

Compression ratio is meaningless without talking about timing so I wouldn’t recommend comparing one engine to another.

I drive an Opel (well, the Vauxhall varient) every day; I have two of them. A diesel Vectra estate/station wagen and a VX220/Speedster. The VX220 doesn’t count as it was designed by Lotus, and the Vectra is universally awful, however i’m pretty sure it would be worse if it cost 700 euros less to make, shared a PSA…

Is this really good news? Williams have a long history of using other manufacturers engines, both in F1 and for their road and sports cars. I’d feel much happier if Singer were going to an engine manufacturer like Cosworth or Swindon

I’ve had plenty of old cars and unfortunately, have ended up with a reason to open up the fuel tank with all of them. They’ve all been spotless. Fuel is a great solvent, any gunk that is in there will have been dissolved and pumped through the system long ago.

They’re not. They’re already considering reducing the targets. https://www.bloomberg.com/news/articles/2017-03-05/china-considers-dialing-back-electric-car-quota-after-opposition

As I said, very speculative. China were also planning for 5 % of all vehicles sold by 2020 to be EV, but this isn’t going to happen. Add to this the poor power network in India (around 40 % losses, mostly due to power theft, compared to >90 % in the US), complexity of negotiating this into law (China can mandate but…

That’s a very speculative comment. Right now the tax system favours diesel massively.

I find the background to this fascinating. GM have a diesel passenger car powertrain design site in Turin, Italy. Unlike the bulk of the European GM assets, this wasn’t transferred to PSA.

CO2 (massive credit in the NEDC to use an automatic transmission over a manual as the NEDC has fixed shift points)

Now they’re an operating team within F1 there’s no issue. The issue was in the 2015 season where Haas deferred entry to 2016, allowing them to operate outside of the resource restrictions imposed by F1. In practice, this meant Ferrari used them as unrestricted resource to develop parts, as well transferring…

Surely there’s only one answer;