" The compact crossover plug-in hybrid has a low fuel consumption figure of 1.9 liters of fuel per 100 km (123.8 mpgUS),..
accelerates from 0 to 62 mph in 4.6 seconds, with a top speed of 250 km/h (155.34 mph)...
Its total driving range is up to 820 km (510 miles)."

It seems misleading to imply A 500 mile trip on under 5 gallons(123.8 mpgUS) when it will require around fifteen gallons after the initial 30 miles electric.

A 123 mpg, very high speed, quick take off, green muscle car!

Every juvenile driver will want one?

Every Juvenile driver will want one, but none will be able to afford one.

A PHEV is really 2 cars in one and its performance will depend on your journey mix.
Ideally, you could buy (say) a 30 mile Erange car, use it for a few months, and then have it assessed when you could add (or subtract) battery capacity.
Or you could get a phone app which monitors your driving before you buy it, and would allow you to size the battery based on real facts.

IMO, a PHEV is an ideal electric car, because you can size the battery to the most common journey length, rather than the longest.

Even if you had a 300 mile battery, it would be much larger and heavier than a 30 mile one (!) and you would hardly ever need the full capacity = better to use chemical fuels for the occasional long run and have a lighter and smaller car in the process.
+ you don't need to rely on rapid chargers, you can use any charger to get the car running in hybrid mode.

When the ECE standard and others use a system that bamboozles the techs and only purpose seems to encourage consumer fantasies, that's what has? to be, will be applied. When in Rome...

I am wondering when molten salt storage will find application for heating in cold climates. This shooting brake rig has a liquid cooled battery and advanced thermal management" cylinder head secret recipie?
More applicable to BEV's heat storage at charge, from battery and e motor cooling or ice pre heating via a well insulated vacuum? molten salt store should be a viable option.2 mode refrigerant heat pump would be a ready option also.
Oscilating heat exchanger designs which operate on passive or low input thermo syphon priciples could be explored in both the above.
We would hope that bevs will continue to decrease system cooling requirements but for sure we will always find an application for extended thermal storage, Pizza deliveries, coffee makers, battery or ice engine and cabin preheater with the usual windscreen defogger.
This turbocharged performance vehicle would be a real problem for juvenile lookers, maybe they will do a no name branded version at a discount without the extra sex appeal.
I know myself being pulled over every few K's can make for a very slow if not unpleasant journey even without extra attention from the good folk in blue.
We good looking intelligent lot already do it hard enough.

Well, to Audi's credit, they have reduced the size of the ICE in half. From a 4-liter V-8 400kW motor in the Sport Quattro PHEV having 700 hp total power now down to 2-liter L-4 200kW motor in practically the same body, same Electric drive train, same battery capacity...now down to only 400 hp total power...in this model. This shows a lot of Eco-responsibility already.

Perhaps future Super-Eco model will have the ICE downsized even further, down to a 1-liter-2-cylinder engine with 100 kW, for a total of 200 kW vehicle. Still a pretty serious sporty vehicle, but more practical. The fuel tank can be downsized to give a range of only 300 miles, while 1/2 of the battery pack can go to the front to produce a lighter vehicle with more internal space, perhaps double the trunk space to 21 cubic feet instead of the meager 10.5 cu ft in this model.

I'm ok with the high averaged MPG figure. Because, looking at the big picture, if all cars were plugin hybrids, we'd indeed get a GASOLINE consumption equivalent of better than 120 MPG.

Its the big picture that matters.

Of course, the rare driver that regularly does 500 mile trips with his or her car will be very disappointed by the mileage... a regular hybrid is a better fit for such a person.

8.8KWH Battery is end of this story for me. Means all this EV power and savings will vanish after a ridiculous amount of time. You will have to plug the car ALWAYs, home, work, everywhere, plus the base drive train remains in a full ICE logics, the EV part adding weight and costs and complexity, and risks of brakedowns, on this even more complex assembly. Looks good on paper realted to theoretical consumption figures, but for me this is NOT the drive train of the future. The car of the future will look like the 1st AUDI eTRON concepts, with a hugely lighter and simpler all electric drive train, a Much Larger Battery pack (>40KWH for me to Jump in), and a small non-tracting Range Extender, with no big central ICE engine, no big central gearbox, no big central transmission... Saving weight and cost and complexity, to fund the much larger battery required, with at the end a faster and more reliable, and better car than today's ICE cars. Neither a hyper-complex and expensive car like this one, nor a downsized car good for nothing like we see elsewhere. Be more radical AUDI if you want me to move from BMW 530DA to your eTRON.

@SJC
In the U.K. a shooting brake was the original SUV, a van with rear windows used for shooting expeditions on the moors. Nothing to do with horses.
This Audi does not look much like one.