If you're considering the 2014 Volvo Vn 670 Tractor Truck, you may also want to consider these similar alternatives:
2015 Freightliner Cascadia
This model is comparable in many ways to the 2014 Volvo Vn 670. It features a double bunk sleeper and a DT12 automatic transmission, similar to the I-Shift found in the Volvo. With a Detroit DD15 engine, it offers similar horsepower. The mileage might be slightly higher or lower depending on the specific unit.
2013 Peterbilt 587
The Peterbilt 587 also comes with a double bunk sleeper and an Eaton Fuller automated transmission which provides smooth gear changes like the I-Shift in Volvo. Powered by Paccar MX-13 engine, it delivers comparable performance and fuel efficiency as the Volvo D13 engine.
2014 Kenworth T680
The Kenworth T680 is another worthy contender with its double bunk sleeper cab and Eaton Fuller UltraShift Plus automated transmission, providing easy handling like Volvo's I-Shift system. Its Paccar MX-13 engine offers similar diesel power as the Volvo D13 engine.
Each of these rival trucks have their own unique attributes while offering similar capabilities as your initial choice - the 2014 Volvo Vn 670 Tractor Truck.