Side-by-side technical data
Lava Z91 vs Lava Smart 4 Plus
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?
Lava Z91, if you care about…
- Display Pixel Density
- 282 ppi
- against 260 ppi
- Body Thickness
- 7.7 mm
- against 8.5 mm
Lava Smart 4 Plus, if you care about…
- Battery Capacity
- 5,000 mAh
- against 3,000 mAh
- RAM Capacity
- 4 GB
- against 2 GB
- Bluetooth Version
- Bluetooth 4.2
- against Bluetooth 4.0
- Maximum Storage Capacity
- 64 GB
- against 16 GB
Specification comparison
Battery
| Specification | Z91 | Smart 4 Plus |
|---|---|---|
| Battery Efficiency Rating | — | — |
| Battery Capacity | 3,000 mAh | 5,000 mAh Best value |
| Battery Type | Li-Polymer | Li-Ion |
| Fast Charge Power | — | 10 W |
| Battery Features | Battery Level Indicator, Rechargeable | Fast Charging |
| Battery Endurance | — | — |
| Wireless charging power | — | — |
| Charge cycles | — | — |
| Talk time | — | — |
| Standby time | — | — |
| Music playback time | — | — |
Design
| Specification | Z91 | Smart 4 Plus |
|---|---|---|
| Body Colors | Blue | Blue, Silver |
| Body Thickness | 7.7 mm Best value | 8.5 mm |
| Body Width | 72.9 mm | 76.1 mm |
| Body Height | 152 mm | 165 mm |
| Weight | 147 g | — |
| Usable Surface | 75.7 % | 87.6 % Best value |
| Body Materials | — | — |
| Resistance Features | — | IP64 |
| Waterproof Depth | — | — |
| Drop Resistance Class | — | — |
| Repairability Class | — | — |
| Foldable | No | No |
| Rugged Build | No | No |
| Drop Test Count | — | — |
| Unfolded thickness | 7.7 mm | — |
| QWERTY keyboard | — | — |
Performance
| Specification | Z91 | Smart 4 Plus |
|---|---|---|
| Processor Model | MediaTek MT6739 | Unisoc SC9863A |
| Processor Process Size | 28 nm | 28 nm |
| Graphics GPU | PowerVR GE8100 | IMG8322 |
| Storage Type | eMMC 5.1 | — |
| Maximum CPU Clock | 1.3 GHz | 1.6 GHz Best value |
| Maximum Storage Capacity | 16 GB | 64 GB Best value |
| AnTuTu Score | — | — |
| Geekbench 6 Single-Core | 456 | — |
| Geekbench 6 Multi-Core | 1,499 | — |
| CPU Description | Quad-core 1.3 GHz Cortex-A53 | Octa-core processor with four 1.6 GHz Cortex-A55 cores and four 1.2 GHz Cortex-A55 cores |
| Processor Type | Quad-Core | Octa-Core |
| 64-Bit Processor | Yes | — |
| RAM Capacity | 2 GB | 4 GB Best value |
| RAM Type | — | — |
| Expandable Storage | Yes | Yes |
| AnTuTu version | — | — |
| 3DMark Wild Life Extreme | — | — |
| Maximum memory card | — | — |
Sensors
| Specification | Z91 | Smart 4 Plus |
|---|---|---|
| Fingerprint Sensor Placement | Rear | Side |
Display
| Specification | Z91 | Smart 4 Plus |
|---|---|---|
| Display Aspect Ratio | 18:9 | 20:9 |
| Peak Display Brightness | — | — |
| Display Technology | IPS LCD | IPS LCD |
| Display Diagonal | 5.7″ | 6.75″ Best value |
| Display Horizontal Resolution | 720 px | 720 px |
| Display Vertical Resolution | 1,440 px | 1,600 px Best value |
| Display Pixel Density | 282 ppi Best value | 260 ppi |
| Display Refresh Rate | — | 90 Hz |
| Touch Sampling Rate | — | — |
| Display Contrast Ratio | — | — |
| Display Features | 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 | — | — |
Sensor
| Specification | Z91 | Smart 4 Plus |
|---|---|---|
| Sensor Features | Fingerprint Sensor, Accelerometer, Proximity Sensor | Fingerprint Sensor, Accelerometer |
Software
| Specification | Z91 | Smart 4 Plus |
|---|---|---|
| Operating System | Android 7 | Android 15 |
| OS Family | Android | Android |
| OS Version | 7 | 15 Best value |
| OS Update Support | — | — |
| Direct OS Updates | No | — |
| Google Services | — | — |
| Web browser | — | — |
| Java (J2ME) | — | — |
Connectivity
| Specification | Z91 | Smart 4 Plus |
|---|---|---|
| SIM Configurations | Dual Nano-SIM | Dual Nano-SIM |
| Cellular Bands | 2G GSM 900, 2G GSM 1800, 3G UMTS B900, 3G UMTS 2100, 4G LTE B1, 4G LTE B3, 4G LTE B5, 4G LTE B40, 4G LTE B41 | 2G GSM 900, 2G GSM 1800, 3G UMTS B900, 3G UMTS 2100, 4G LTE B1, 4G LTE B3, 4G LTE B5, 4G LTE B8, LTE B28, 4G LTE B40, 4G LTE B41 |
| Cellular Technologies | GSM, HSPA, UMTS, LTE, 4G | GSM, HSPA, LTE |
| Wi-Fi Standards | Wi-Fi 802.11a/b/g/n/ac, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac) | Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 802.11b/g |
| Wi-Fi Features | Dual Band, Wi-Fi Direct | — |
| Bluetooth Version | Bluetooth 4.0 | Bluetooth 4.2 Best value |
| Bluetooth Profiles | A2DP | A2DP |
| Navigation Systems | GPS | GPS, GLONASS Best value |
| Connectivity Features | 3.5 mm Audio Jack, FM Radio, microUSB, USB OTG | 3.5 mm Audio Jack, Virtual Proximity Sensing, Infrared, FM Radio, USB Charging, USB Type-C, USB OTG, USB 2.0 |
| USB Version | microUSB | USB 2.0 |
| SAR American Head | — | — |
| SAR American Body | — | — |
| SAR (EU) head | — | — |
| SAR (EU) body | — | — |
| Messaging | — | — |
Audio
| Specification | Z91 | Smart 4 Plus |
|---|---|---|
| Microphone Count | 1 | — |
| Audio Features | A2DP, Loudspeaker | A2DP, Stereo Speakers Best value |
| Alert types | — | — |
Technical
| Specification | Z91 | Smart 4 Plus |
|---|---|---|
| EAN / GTIN | — | — |
| UPC | — | — |
| Launch price | — | — |
| MPN | — | — |
| Launch price (USD) | — | — |
Features
| Specification | Z91 | Smart 4 Plus |
|---|---|---|
| Built-in functions | — | — |
