The yard shot (chicago 14th street coach yard) is likely just whatever train they could find. Notice the train is facing south, unlikely for #4 during daytime. #4 usually approaches facing north, discharges, and backs out to the yard. By the time it's washed and turned, it's probably near dark this time of year.
The first picture has 3 sleepers plus trans dorm, and 3-4 coaches. There's also 3-4 PV's on the train, so the extra power is understandable.
As for Clarkson, ignore him. He's like a radio shock jock. He's quite funny sometimes but you can't take him too seriously, as he puts on the act because he knows it drives viewership. Half of his reason to sneer at trains is because James May likes trains and overall has a laid back personality, known as Mr. Slow. Jeremy and Richard enjoy ribbing him for this, and this includes his like for trains. If I recall, May's daily driver is a Rolls Royce Shadow MkII. Talk about pokey and gas guzzling. That said, if you dislike gas guzzlers, this isn't the show for you. I'd suggest NPR's "the delicious dish" instead.
The new Acela: It's not Aveliable.