The 2015 Honda Accord V6 models are timing belts. The 4-cylinder version uses timing chain.
The 4 cylinder has a timing chain and the V6 has a timing belt that must be replaced every 105,000 miles.
It has a timing chain that requires no maintenance.
The 2015 Honda Accord (all trim levels) is 191.4 inches in sedan form, and 189.2 inches in coupe form.
belt
I see no reason why you can't.
17.2 gallons
17 gallons.
17 gallons
It might be possible. Both cars have the same bolt pattern (5 x 114.3), and the Accord might be able to accommodate the larger wheels/tires that are on the Si.
No, it uses a chain that should last the life of the engine. All this is spelled out in your owners manual.
At least by Sept 2015.
I think the Honda Pilot will start its 3rd generation for 2014 or 2015.