Toyota has been in the minivan market for decades, though the Sienna didn’t roll on the scene until 1998. That first year, the Sienna was marketed as the “Camry of Minivans.” That made sense since it was based on the Camry and used the same 194-horsepower, 3.0-liter V-6. The second-generation Sienna came around in 2004 with much improved styling that looked more grown up. A larger, more powerful V-6 was used and the interior had more creature comforts. Things soldiered on almost unchanged until 2011 when the third generation entered production.