The increasing popularity of ultra-heavy SUVs in England means a conventional-engined car bought in 2013 will, on average, have lower carbon emissions than one bought new today, new research has found.
The study by the climate campaign group Possible said there was a strong correlation between income and owning a large SUV, which meant there was a sound argument for “polluter pays” taxes for vehicle emissions based on size.
Better fuel management in general? More forced induction engines than before? Improvement on existing tech? New emission control equipment like DPF, SCR (that thing that made the difference between cars that only required a retune vs cars that required a buyback/mechanical modifications for VW diesels)?
Do you think manufacturers have been using the same engines and fuel injection methods since the introduction of OBDII or something?
Smaller cars can also get by without things like direct injection because they don’t require as much power to get going, but under constant load (on highways) it means worse control over fuel injection vs more modern tech.
https://wikis.ec.europa.eu/display/ULEV/Emission+control+technologies
Heck, just go take a look at the source of the study and you’ll realize it’s totally biased.