Time for another product comparison; I am looking at two more Garmin automotive GPS units - the Garmin nuvi 255 versus the Garmin nuvi 775T. Both are excellent automotive GPS systems. The nuvi 255 is built more for the budget conscious traveler; whereas, the nuvi 775T has more options to offer and increased functional capacity. Here are the functions that are the same in both: They both have color displays to make it easy to read the screen. Both have rechargeable lithium-ion batteries, the battery lasting approximately 4 hours on the nuvi 255 and 3 hours on the nuvi 775T. Each has a high-sensitivity GPS receiver. Neither of them is waterproof, so I wouldn't recommend using them as a motorcycle GPS unit; however, waterproof is not really an issue in automotive GPS units. Both come with preloaded street maps and the ability to add more maps if you are interested, but the nuvi 775T includes transatlantic maps which can be nice when you travel to Europe. Both of these versions of the Garmin nuvi come with internal solid state built-in memory and are designed to hold 1,000 Waypoints/favorites/locations; the nuvi 755T also built to remember up to 10 routes. Each includes a basemap and accepts data cards which are not included, but it would be handy to have for additional memory. Neither of these Garmin nuvi versions includes voice-activated navigation, so you are not able to operate the device with spoken commands; sorry about that one as that is a nice feature, but is yet another perk to look for in other automotive GPS systems in future reviews.

Both include choice of route setup for either faster time, shorter distance, or off road and route avoidance to help you avoid highways, tolls etc., also handy features to have in automotive GPS units. Both of these versions of Garmin nuvi also are FM traffic compatible (with receiver and lifetime traffic included with the nuvi 755T) and are MSN® Direct compatible and have a speed limit indicator which displays speed limit for most major roads in the U.S. and Europe. Both also have the functionality of the Where Am I? feature to help you find the closest hospitals, police & gas stations, nearest address & intersection and ecoRoute^TM which calculates a more fuel-efficient route and the ability to add custom POIs (points of interest), all great features to have in unfamiliar territory. Personalize either Garmin nuvi version by adding Garmin Garage^TM vehicles and voices, a free service at Garmin where you can download car-shaped icons and custom voices to your device. Photo navigation in order to navigate to geotagged photos, World travel clock, currency & unit converter, calculator and picture viewer are also nice features available in both.

Now for more differences between the two: The Garmin nuvi 755T has a few more features which the nuvi 255 does not. The nuvi 755T has higher display resolution and a 4.3-inch diagonal screen compared to the 3.5-inch screen of the nuvi 255. Nuvi 755T also includes 3-D building view which displays buildings in 3-D, the ability to auto sort multiple destinations which provides the most direct route, and Bluetooth® wireless technology so you can connect to your phone for hands-free calling. Garmin Locate^TM marks your position when the GPS receiver is removed from the windshield mount - this can be really handy to help you remember where you parked your vehicle. The included MP3 player, Audio book player and FM transmitter with headphone jack/audio line-out will entertain you on your travels.

Oh, I nearly forgot to mention that both of these Garmin nuvi automotive GPS systems come with Garmin Lock^TM anti-theft feature and touchscreen convenience. Well, I hope that helps to sort out the differences and advantages of each of these Garmin nuvi versions for you. Happy traveling!