BenQ-Siemens
Side-by-side technical data
BenQ-Siemens M81 vs BenQ-Siemens P51
Compare up to four phones using typed, normalized technical data. Measurements stay numeric, capabilities stay boolean, and options stay comparable.
The verdict
Neither runs away with it: each wins something.
Which one is for you?
BenQ-Siemens M81, if you care about…
- Weight
- 96 g
- against 170 g
- Body Thickness
- 18.4 mm
- against 20 mm
- Talk time
- 5 h
- against 4 h
- Standby time
- 300 h
- against 150 h
BenQ-Siemens P51, if you care about…
- Battery Capacity
- 1,370 mAh
- against 820 mAh
- RAM Capacity
- 64 MB
- against 27 MB
- Maximum Storage Capacity
- 192 MB
- against 27 MB
- Display Pixel Density
- 143 ppi
- against 122 ppi
Specification comparison
Battery
| Specification | M81 | P51 |
|---|---|---|
| Battery Efficiency Rating | — | — |
| Battery Capacity | 820 mAh | 1,370 mAh Best value |
| Battery Type | Li-Ion | Li-Ion |
| Fast Charge Power | — | — |
| Battery Features | — | — |
| Battery Endurance | — | — |
| Wireless charging power | — | — |
| Charge cycles | — | — |
| Talk time | 5 h Best value | 4 h |
| Standby time | 300 h Best value | 150 h |
| Music playback time | — | — |
Design
| Specification | M81 | P51 |
|---|---|---|
| Body Colors | Black, Blue | — |
| Body Thickness | 18.4 mm Best value | 20 mm |
| Body Width | 47.5 mm | 60 mm |
| Body Height | 105.3 mm | 122 mm |
| Weight | 96 g Best value | 170 g |
| Usable Surface | 20.1 % | 33.2 % Best value |
| Body Materials | — | — |
| Resistance Features | Dust Resistant | — |
| Waterproof Depth | — | — |
| Drop Resistance Class | — | — |
| Repairability Class | — | — |
| Foldable | No | No |
| Rugged Build | No | No |
| Drop Test Count | — | — |
| Unfolded thickness | — | 20 mm |
| QWERTY keyboard | — | Yes |
Performance
| Specification | M81 | P51 |
|---|---|---|
| Processor Model | — | — |
| Processor Process Size | — | — |
| Graphics GPU | — | — |
| Storage Type | — | — |
| Maximum CPU Clock | — | 0.416 GHz |
| Maximum Storage Capacity | 27 MB | 192 MB Best value |
| AnTuTu Score | — | — |
| Geekbench 6 Single-Core | — | — |
| Geekbench 6 Multi-Core | — | — |
| CPU Description | — | 32-bit Intel XScale PXA272 416 MHz |
| Processor Type | — | — |
| 64-Bit Processor | — | — |
| RAM Capacity | 27 MB | 64 MB Best value |
| RAM Type | — | — |
| Expandable Storage | Yes | Yes |
| AnTuTu version | — | — |
| 3DMark Wild Life Extreme | — | — |
| Maximum memory card | — | — |
Sensors
| Specification | M81 | P51 |
|---|---|---|
| Fingerprint Sensor Placement | — | — |
Display
| Specification | M81 | P51 |
|---|---|---|
| Display Aspect Ratio | 4:3 | 4:3 |
| Peak Display Brightness | — | — |
| Display Technology | TFT LCD | TFT LCD |
| Display Diagonal | 1.8″ | 2.8″ Best value |
| Display Horizontal Resolution | 132 px | 240 px Best value |
| Display Vertical Resolution | 176 px | 320 px Best value |
| Display Pixel Density | 122 ppi | 143 ppi Best value |
| Display Refresh Rate | — | — |
| Touch Sampling Rate | — | — |
| Display Contrast Ratio | — | — |
| Display Features | — | Resistive Touchscreen, Touchscreen |
| Integrated Projector | No | No |
| Projector Brightness | — | — |
| Projector Horizontal Resolution | — | — |
| Projector Vertical Resolution | — | — |
| Cover display diagonal | — | — |
| Cover display refresh rate | — | — |
| Cover display peak brightness | — | — |
| Display colors | 256K colors | 256K colors |
Sensor
| Specification | M81 | P51 |
|---|---|---|
| Sensor Features | — | — |
Software
| Specification | M81 | P51 |
|---|---|---|
| Operating System | — | Windows Mobile 5.0 |
| OS Family | — | Windows Mobile |
| OS Version | — | 5 |
| OS Update Support | — | — |
| Direct OS Updates | — | — |
| Google Services | — | — |
| Web browser | WAP 2.0/xHTML | WAP 2.0/xHTML, HTML Best value |
| Java (J2ME) | Yes | — |
Connectivity
| Specification | M81 | P51 |
|---|---|---|
| SIM Configurations | Mini-SIM | Mini-SIM |
| Cellular Bands | 2G GSM 900, 2G GSM 1800, 2G GSM 1900 | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900 |
| Cellular Technologies | GSM, GPRS, EDGE | GSM, GPRS |
| Wi-Fi Standards | — | Wi-Fi 802.11b/g |
| Wi-Fi Features | — | VoIP over WLAN |
| Bluetooth Version | — | Bluetooth 1.2 |
| Bluetooth Profiles | — | A2DP |
| Navigation Systems | — | GPS |
| Connectivity Features | MP3 Player, USB 2.0 | MP3 Player |
| USB Version | USB 2.0 | Proprietary |
| SAR American Head | — | — |
| SAR American Body | — | — |
| SAR (EU) head | — | — |
| SAR (EU) body | — | — |
| Messaging | SMS, MMS, Email, Instant messaging | — |
Audio
| Specification | M81 | P51 |
|---|---|---|
| Microphone Count | — | — |
| Audio Features | — | A2DP, Loudspeaker |
| Alert types | Vibration, Downloadable ringtones, Polyphonic ringtones, MP3 ringtones | Vibration, Downloadable ringtones, Polyphonic ringtones, MP3 ringtones |
Technical
| Specification | M81 | P51 |
|---|---|---|
| EAN / GTIN | — | — |
| UPC | — | — |
| Launch price | — | — |
| MPN | — | — |
| Launch price (USD) | — | — |
Features
| Specification | M81 | P51 |
|---|---|---|
| Built-in functions | MP3 player, Organizer, Voice memo, Predictive text input | MP3 player, Voice command |
